Faq

How should I store unused silicone?

In sealed containers at 10-25°C. Shelf life: 12 months (tin) / 6 months (platinum).

2025-06-18

Is RTV-2 skin-safe?

Wear nitrile gloves. Uncurred components may cause irritation. Wash with soap if contacted.

2025-06-18

What’s "platinum vs. tin" cure?

Platinum: food/medical-safe, low odor. Tin: cost-effective but may inhibit with certain materials.

2025-06-18

How to make translucent molds?

Choose optically clear grades and degas thoroughly to eliminate micro-bubbles.

2025-06-18

Can I color RTV-2 silicone?

Yes, use ≤3% silicone-specific pigments. Excessive pigment slows curing.

2025-06-18

Why did my mold distort?

Curing too fast at high temps, insufficient support shell, or premature demolding.

2025-06-18

How to prevent mold tearing during demolding?

Design draft angles >3°, avoid undercuts, and use tear-resistant silicones (e.g., 20-30 Shore A).

2025-06-18

Why do air bubbles trap on model surfaces?

Degas insufficiently, pour too high, or apply barrier coat too thickly. Pre-wet model with silicone thinner.

2025-06-18

Can I cast low-melt metals?

Only with high-heat silicones (≥250°C rating). Standard RTV-2 degrades above 180°C.

2025-06-18

What casting materials work best?

Epoxy, polyurethane, polyester resins, wax, gypsum. Avoid sulfur-containing materials.

2025-06-18

Will RTV-2 damage my 3D-printed model?

Use only non-porous models (sealed with acrylic spray) to prevent silicone adhesion.

2025-06-18

Why does my silicone remain tacky after curing?

Under-mixing, incorrect ratios, or contamination (sulfur, tin, amines) can inhibit curing.

2025-06-18

How do I speed up curing?

Increase environment temperature (max 40°C) or add 0.1-0.5% extra catalyst (test first).

2025-06-18

What affects cure time?

Temperature (ideal 23-25°C), humidity, and catalyst volume. Higher temp accelerates curing.

2025-06-18

Can I pour silicone directly onto delicate objects?

Apply a thin barrier coat first with a brush to capture details, then pour bulk material.

2025-06-18

How long should I degas silicone?

Vacuum degas for 2-3 minutes at ≤ -0.09 MPa until bubbles disappear. Thicker silicones require longer.

2025-06-18

What’s the optimal mixing technique?

Stir slowly for 3-5 minutes in a circular motion, scraping container walls to avoid unmixed material.

2025-06-18

How do I accurately measure components?

Use calibrated weight scales for 10:1 ratios; volume cups for 1:1 systems. Never estimate visually.

2025-06-18

What is the standard mix ratio for RTV-2?

Common ratios are 1:1 or 10:1 (A:B). Always check the product datasheet for exact ratios.

2025-06-18

What distinguishes RTV-2 from other silicones?

RTV-2 requires mixing Part A (base) and Part B (catalyst), offering superior dimensional stability and low shrinkage vs. single-component silicones.

2025-06-18

What is RTV-2 silicone?

Room-Temperature-Vulcanizing (RTV) silicone is a two-part liquid compound that cures into flexible rubber at room temperature, ideal for precision mold making.

2025-06-18

How is viscosity measured?

In centipoise (cP)—low viscosity (500–2,000 cP) for intricate parts; high (5,000+ cP) for thick pours.

2025-06-17

What’s the difference between 1K and 2K compounds?

1K (single-component) requires heat/moisture to cure; 2K (two-part) cures at room temp.

2025-06-17

Can potting replace heatsinks?

Thermally conductive compounds (3–5 W/mK) can transfer heat to enclosures as "pot-sinks."

2025-06-17

How does moisture affect dielectric strength?

Unprotected PCBs drop to 20 kV/mm.

2025-06-17

How to reduce potting material waste?

Use precision dispensing equipment; select longer pot-life grades.

2025-06-17

Are bio-based/eco-friendly compounds offered?

Plant-derived epoxies/PUs available—ask about sustainable series.

2025-06-17

Medical device-compatible options?

ISO 10993-tested silicones for biocompatibility.

2025-06-17

Potting for drone electronics?

Lightweight PU (density

2025-06-17

Recommended compound for outdoor solar inverters?

UV-stable, thermally conductive silicone (>2 W/mK) for heat dissipation.

2025-06-17

What’s best for automotive ECU potting?

Silicone for vibration/temperature resistance; meets ISO 16750 standards.

2025-06-17

Can I get samples for testing?

Free samples available—specify product code and application details.

2025-06-17

How do I request a technical datasheet (TDS)?

Download from product pages or contact us for SDS/TDS packages.

2025-06-17

Do you provide custom formulations?

Yes—tailor hardness, cure time, color, or conductivity for your project.

2025-06-17

Can potting protect underwater electronics?

IP68-rated silicones/PUs withstand long-term submersion up to 10m depth.

2025-06-17

Are optical-grade transparent compounds available?

Optically clear silicones (e.g., for LEDs/sensors) with >90% light transmission.

2025-06-17

Do you offer EMI-shielding compounds?

Yes, silver/nickel-filled grades provide >60 dB shielding at 1 GHz.

2025-06-17

Can potting compounds be reworked?

Silicones are removable; epoxies are permanent. Use mechanical/thermal methods.

2025-06-17

Why is the potting still tacky after 24 hours?

Incorrect mix ratio, low temperature, or expired product—verify process and materials.

2025-06-17

What causes delamination from enclosures?

Poor surface preparation or adhesion—use primers or select high-adhesion grades.

2025-06-17

Why did my epoxy crack after curing?

Likely due to CTE mismatch or excessive exothermic heat—switch to flexible silicone/PU.

2025-06-17

How should I store potting compounds?

Keep unopened containers at 5–25°C; use within 6–12 months.

2025-06-17

Do you offer NSF-certified food-grade compounds?

Yes, silicone options meet NSF/ANSI 51 for food equipment.

2025-06-17

Are your compounds RoHS/REACH compliant?

All products meet EU RoHS 2/3 and REACH SVHC standards—certificates available.

2025-06-17

Will potting compound damage sensitive components?

Low-stress silicones are safe for fine wires/sensors; test compatibility first.

2025-06-17

Is thermal management needed during curing?

For exothermic epoxies, avoid large volumes to prevent cracking from heat buildup.

2025-06-17

How thick should the potting layer be?

Minimum 2–3mm for moisture protection; adjust based on component height.

2025-06-17

Can bubbles in potting cause failures?

Yes. Degas before pouring or use vacuum potting systems to eliminate voids.

2025-06-17

What mixing methods are recommended?

Use dual-cartridge dispensers or automated systems for precise 1:1/2:1 ratios.

2025-06-17

How do I prepare components before potting?

Clean surfaces with IPA, pre-bake to remove moisture, and mask sensitive areas.

2025-06-17

How important is CTE (Coefficient of Thermal Expansion)?

Low CTE (

2025-06-17

What’s the typical operating temperature range?

Silicone: -50°C to +200°C; Epoxy: -40°C to +150°C; PU: -40°C to +125°C.

2025-06-17

Can potting compounds withstand high humidity?

Silicone and PU excel in humid environments; check IP68 ratings for waterproofing.

2025-06-17

What Shore hardness should I use?

Shore D60+ (rigid) for impact protection; Shore A30–90 (flexible) for vibration dampening.

2025-06-17

How long does curing take?

Room-temperature cure: 24–72 hours; heat-cured: 1–4 hours. Check datasheets for specifics.

2025-06-17

What is pot life?

The time after mixing when compound remains workable (typically 30–90 minutes).

2025-06-17

Are flame-retardant potting compounds available?

Yes, UL 94 V-0 rated compounds meet strict flammability standards.

2025-06-17

How do I select between thermal conductivity options?

Choose thermally conductive compounds (>1 W/mK) for power electronics; standard compounds (

2025-06-17

What are the advantages of polyurethane (PU)?

PU balances flexibility, moisture resistance, and cost-effectiveness for consumer electronics.

2025-06-17

Why use epoxy for potting?

Epoxy offers high hardness, chemical resistance, and adhesion—suited for industrial electronics.

2025-06-17

When should I choose silicone potting compound?

Ideal for extreme temperatures (-50°C to 200°C+), high flexibility, and medical/automotive applications.

2025-06-17

What are the main types of potting compounds?

Epoxy, polyurethane (PU), and silicone are the three primary types.

2025-06-17

What’s the difference between potting, encapsulation, and conformal coating?

Potting fully immerses components; encapsulation coats surfaces; conformal coating is a thin protective film.

2025-06-17

Why is potting necessary for electronics?

It prevents moisture ingress, chemical corrosion, vibration damage, and electrical shorts, extending product lifespan.

2025-06-17

What is potting compound?

Potting compound is a liquid polymer that cures into a solid protective layer around electronic components, shielding them from environmental damage.

2025-06-17

Q: Besides potting compounds, do you offer other thermal management materials?

A: Yes, we offer complete thermal management solutions, including thermally conductive gels, thermally conductive pads, thermally conductive structural adhesives, phase change materials, etc., to meet the needs of different application scenarios.

2025-12-09

Q: What is the minimum order quantity (MOQ)? Do you support small orders?

A: For standard products, we offer a flexible MOQ policy to support customer R&D and small-batch pilot production. Please consult our sales team for details.

2025-12-09

Q: How do you ensure the quality and stable supply of raw materials?

A: We have established strategic partnerships with globally renowned raw material suppliers and conduct rigorous testing on raw materials. We also have our own production bases and inventory strategies to cope with market fluctuations and ensure stable supply.

2025-12-09

Q: How do I evaluate and verify if a potting compound is suitable for my product?

A: We recommend systematic verification: 1) Laboratory performance testing (thermal conductivity, insulation, etc.); 2) Process compatibility testing (dispensing, curing); 3) Small-batch trial production; 4) Necessary environmental reliability testing (temperature cycling, vibration, double 85, etc....

2025-12-09

Q: What substances are the product sensitive to that can cause "poisoning" and failure to cure?

A: Addition-cure silicone should avoid contact with compounds containing nitrogen, phosphorus, and sulfur (such as certain fluxes, rubber, and epoxy resins), as well as heavy metals such as tin and lead. Ensure the substrate is clean before potting

2025-12-09

Q: Can cured potting compounds be repaired?

A: Cured silicone potting compound forms an elastomer, possessing a degree of repairability. Damaged components can be replaced by cutting, removing, or other methods, followed by re-potting.

2025-12-09

How to clean uncured adhesive? A

A: Uncured adhesive can be wiped clean with solvents such as anhydrous ethanol or acetone. Once cured, it must be removed mechanically.

2025-12-09

Q: What precautions should be taken for components with large potting thickness?

Deep cavity potting is prone to heat accumulation and air bubbles. Recommendations: 1) Layered potting, allowing each layer to cure before applying the next; 2) Use vacuum potting technology; 3) Choose a model with gentle heat release and a long operating time.

2025-12-09

Q: Will the product's performance degrade after long-term high-temperature aging?

A: Our products undergo rigorous aging tests. For example, after aging at high temperatures (e.g., 150℃) for 1000 hours, the degradation of key properties (hardness, thermal conductivity, adhesion) can be controlled at an extremely low level (e.g.,

2025-12-09

Q: What are the insulation properties (dielectric strength, volume resistivity) of our potting compound?

Our potting compound has excellent electrical insulation properties, with typical values such as dielectric strength ≥15-25 kV/mm and volume resistivity ≥1.0×10¹⁵ Ω·cm, providing reliable insulation protection for high-voltage components.

2025-12-09

Q: Why is the "low oil seepage" characteristic important?

A: Leaking grease can contaminate delicate optical lenses (such as cameras and radar sensors), cause poor connector contact, or attract dust, seriously affecting the long-term reliability of equipment. Our low oil seepage products can eliminate such risks.

2025-12-09

Q: Does high thermal conductivity mean high cost? How to balance cost-effectiveness?

A: Yes, thermally conductive fillers are more expensive. We recommend selecting products based on specific needs, choosing products with appropriate thermal conductivity while meeting the heat dissipation design margin, avoiding overkill. Our product line is extensive, providing cost-effective ...

2025-12-09

Q: What are the main differences and advantages of thermally conductive potting compounds compared to thermally conductive pads and thermally conductive grease?

Potting compounds are liquid fillers that cure quickly, perfectly filling irregular gaps and achieving full contact without air layers, resulting in superior heat dissipation. They also provide structural protection and three-proof (waterproof, dustproof, and shockproof) functions, which solid ...

2025-12-09

Do you provide samples for testing? How can I obtain them? A

A: We provide small-batch samples for testing and verification to eligible potential customers. You can submit your request through the contact information on the website or the sample application channel, and our sales engineer will contact you as soon as possible.

2025-12-09

Q: How are your delivery times and logistics guarantees for the Southeast Asian market?

A: We have established a stable supply chain channel in Southeast Asia. Through cooperation with high-quality local logistics providers, the standard delivery time can be controlled within 7-15 days, effectively ensuring the production plans of OEMs and manufacturers.

2025-12-09

Q: Can excess adhesive be saved for later use?

A: No. Two-component adhesives begin curing immediately after mixing and must be used immediately; otherwise, they will harden and become unusable, resulting in waste.

2025-12-09

Q: If the adhesive separates or settles after a period of storage, does this mean it has become ineffective?

A: Filler sedimentation is a physical phenomenon and not indicative of ineffectiveness. Each container of adhesive (especially component A) must be thoroughly stirred before use to restore its original properties.

2025-12-09

Q: What is the shelf life of the product? How should it be stored?

Unopened, original packaged products typically have a shelf life of 12 months when stored in a cool, dry place (below 25℃). Both components must be stored separately in sealed containers to prevent moisture absorption.

2025-12-09

How to avoid cracking after potting?

A: Cracking is usually due to a mismatch in the coefficients of thermal expansion between the potting compound and the casing/component, or external impact during the curing process. Choose a silicone potting compound with good elasticity and low shrinkage, and avoid moving or vibrating the product ...

2025-12-09

What if the curing speed is too slow in winter or in a low-temperature workshop?

This is a normal phenomenon at low temperatures. The most effective solution is to use heat curing, such as moving the potted product to an oven at 25°C or higher, which can significantly accelerate the curing process.

2025-12-09

Q: What causes the surface to be sticky or partially uncured after curing?

A: Possible causes include: severely imbalanced mixing ratio, uneven mixing, or contact between components A and B and substances that hinder curing (such as chemicals containing sulfur, phosphorus, or amines, or certain plasticizers) -4 -9. The operating environment and material compatibility need ...

2025-12-09

What should I do if air bubbles appear inside or on the surface after curing?

Bubbles mainly come from air trapped during mixing or moisture in the substrate. Recommendations: 1) Preheat the substrate before potting to help air escape; 2) Vacuum degas the mixed compound; 3) Operate in a low-humidity environment -

2025-12-09

Q: Why does the potting compound take so long to cure or has a low hardness after mixing?

The most common reason is inaccurate weighing of components A and B or insufficient mixing of each component before mixing. Ensure precise 1:1 weight ratio mixing and thorough mixing (10-15 minutes recommended) -

2025-12-09

Q: Will the potting compound corrode my plastics or sensitive components?

A: Our silicone-based potting compounds are chemically stable, produce no byproducts during curing, and are non-corrosive to most plastics and metals. However, we recommend conducting compatibility testing on specific materials before use.

2025-12-09

Q: What is the viscosity? Is it suitable for automated dispensing equipment?

A: We offer products with different viscosities. Some models feature high extrusion rates (e.g., 115g/min), making them ideal for automated production lines. They significantly improve coating efficiency and match high-speed production cycles.

2025-12-09

Q: What is the pot life?

A: Pot life is affected by temperature. At 25℃, it is typically 45 to 90 minutes, providing ample operating window. Higher temperatures will shorten the pot life accordingly.

2025-12-09

Q: What are the curing conditions? Is special equipment required?

We support room temperature curing or heat curing. Heat curing can significantly shorten the time (e.g., 15-30 minutes at 80℃). Our curing temperature (e.g., 100℃) falls within the medium to low temperature range and can be directly adapted to customers' existing ovens or tunnel ovens, requiring no ...

2025-12-09

Q: Is the product single-component or two-component? What is the mixing ratio?

We primarily recommend two-component (A/B adhesive) products with a 1:1 mixing ratio. The mixing ratio is simple and easy to use.

2025-12-09

Q: Can your products be used in the automotive electronics field and meet relevant standards?

A: Absolutely. We have a product series specifically developed for automotive electronics (such as vehicle radar and battery management systems), featuring excellent vibration resistance, wide temperature range (-40℃ to above 150℃), and low oil permeability, meeting the reliability and safety ...

2025-12-09

Q: Our factory manufactures consumer electronics for international brands, which places high demands on material consistency. How do you guarantee this?

A: We ensure that the performance parameters (such as viscosity and thermal conductivity) of each batch of products fluctuate within a very small range (e.g., within 5%) through a strict quality management system, perfectly meeting the stringent consistency and reliability requirements of contract ...

2025-12-09

Q: How do I choose the appropriate thermal conductivity potting compound for my specific application?

A: This depends on your power density and heat dissipation design. For example, a typical power module may require 1.0-2.0 W/m·K, while a high-power 5G RF module or server chip may require 3.0 W/m·K or higher. Our technical team can provide you with selection advice.

2025-12-09

Q: What special design features do your potting compounds have for the hot and humid climate of Southeast Asia?

Our products have excellent high temperature and high humidity resistance. After curing, they can resist the corrosion of components by humid and hot environments for a long time, preventing short circuits or performance degradation caused by humidity.

2025-12-09

Q: What industries and applications are your products suitable for?

A: Widely applicable to 5G communication base stations, optical modules, new energy vehicle power supplies (OBC/DC-DC), consumer electronics (tablets/laptops), industrial sensors, power modules, and automotive electronics (radar, controllers), and other fields requiring efficient heat dissipation ...

2025-12-09

Q: What is the flame retardancy rating of our products?

A: Many of our products have excellent flame retardant properties, achieving a UL94-V0 rating, providing higher safety guarantees for applications such as communication equipment, consumer electronics, and automotive electronics.

2025-12-09

Q: Are your products environmentally compliant?

A: Yes. Our products meet international environmental regulations such as EU RoHS and REACH. Their low volatility (D4~D10

2025-12-09

Q: What are the main advantages of your products?

A: Our product advantages include: high thermal conductivity (up to 3.0W/m·K or higher), low volatility, and low oil seepage, which ensures the cleanliness of the internal components and long-term reliability of the equipment. At the same time, we strictly control batch consistency, resulting in ...

2025-12-09

Q: What types of potting compounds do you mainly offer?

A: We mainly provide two-component addition-curing silicone rubber thermally conductive potting compounds. These products have excellent high and low temperature resistance (e.g., -60℃ to 250℃), good elasticity, low shrinkage, and stable electrical insulation.

2025-12-09

Q: What is thermally conductive potting compound? What is its main function?

Thermally conductive potting compound is a material used to fill and encapsulate electronic components. It primarily provides comprehensive protection, including heat dissipation, insulation, moisture protection, shock absorption, and corrosion resistance, ensuring the long-term reliable operation ...

2025-12-09

Q: What are the storage conditions and shelf life of silicone gel?

2025-12-09

How can I avoid generating bubbles in the potting process?

A: We recommend using vacuum degassing equipment. Our Low-Viscosity series also has excellent defoaming properties and can provide detailed potting process guidance.

2025-12-09

What is the minimum order quantity? Do you support small-batch customization?

We support small-batch purchasing and customized formulations. The MOQ for standard products is only 20 kg. For details on customized products, please consult our sales team.

2025-12-09

Q: Can I request free samples for testing? What is the process?

A: Free samples are welcome. Please submit your request through the "Sample Request" channel on our website. We will match the most suitable model and send it to you, along with the TDS and operating instructions.

2025-12-09

Q: How do I select the right silicone gel for my application?

A: Please tell us your specific application, curing conditions, and key performance requirements (such as thermal conductivity and viscosity). Our engineers will provide free selection guidance.

2025-12-09

Q: Some consumer electronics products require aftermarket repair. Is the silicone gel removable?

Yes. We offer reusable silicone gel that remains elastic after curing, allowing for non-destructive disassembly for PCB repair and component replacement.

2025-12-09

Q: Air conditioner controllers are easily damaged in humid environments. What potting recommendations are there?

A: Use our Anti-Condensation Gel, which prevents condensation from forming on the circuit board, protecting the appliance control board for stable operation in hot and humid environments.

2025-12-09

For smartphone charger production, fast-curing potting materials are needed to increase production volume. Are there any solutions?

A: Yes. Our Rapid-Pot series supports low-temperature curing at 60°C, reducing curing time by 50%, and is optimized for large-scale consumer electronics production.

2025-12-09

How to balance waterproofing and sound quality when potting Bluetooth speaker speakers?

A: AudioSeal series provides waterproof and moisture-proof protection while offering high sound wave transmittance, making it a perfect solution for speaker and microphone potting.

2025-12-09

Q: What low-viscosity silicone gels are recommended for waterproof sealing of smart wearable devices?

It s extremely low viscosity, capable of sealing tiny gaps, achieving IP67/68 waterproofing for consumer electronics, and is skin-friendly.

2025-12-09

Is the volume resistivity of the silica gel used in photovoltaic energy storage systems important?

Absolutely. High volume resistivity (>1×10¹⁵ Ω·cm) ensures excellent electrical insulation, preventing the risk of DC-side leakage.

2025-12-09

Q: What level of waterproofing is required for potting junction boxes and junction boxes?

A: Our encapsulating silicone can achieve an IP68 protection rating for modules and provide a lifetime moisture-proof seal for solar junction boxes.

2025-12-09

What fast-curing silicone gel solutions can improve the production efficiency of PV microinverters?

A: We recommend the FastCure 120 series, which cures in just 30 minutes at 80°C, significantly increasing your potting process capacity.

2025-12-09

What properties of silicone gel are most important for potting lithium-ion battery packs in energy storage systems?

Flame retardancy and thermal management are key concerns. Our ESS-Gel boasts UL94 V-0 flame retardancy and excellent thermal conductivity, enhancing battery safety.

2025-12-09

Q: How can potting compounds used in outdoor PV inverters resist UV and damp heat aging?

Our PV-800 series contains UV stabilizers and has passed a 3000-hour damp heat test, designed specifically to extend the lifespan of solar inverters.

2025-12-09

Q: Will the silicone gel used in automotive radar sensors affect signal transmission?

A: No. Our radar-specific silicone gel has extremely low dielectric constant and loss factor, making it ideal for encapsulating ADAS systems and millimeter-wave radar.

2025-12-09

Q: Do you have moisture-proof and shock-proof potting solutions for motorcycle ECUs?

Yes. The Moto-Seal series has excellent flowability and can completely penetrate the PCB to form a waterproof and moisture-proof protective layer, perfectly resisting the rainy and bumpy road conditions of Southeast Asia.

2025-12-09

Q: How do your potting compounds help new energy vehicles cope with high-voltage environments?

A: Our high-voltage insulating silicone gel has a dielectric strength of >25 kV/mm, providing reliable electrical insulation protection for on-board chargers and DC-DC converters.

2025-12-09

What kind of silicone gel is needed for potting motor controllers in electric vehicles?

A: High insulation, high temperature resistance, and shock resistance are required. Our EV-02 series performs stably at 200°C and effectively protects IGBT modules.

2025-12-09

Q: What high thermal conductivity silicone gels are recommended for battery management systems in electric vehicles?

A: We recommend our TC-300 series, with a thermal conductivity of up to 2.5 W/m·K, specifically designed for BMS and power battery potting to achieve efficient thermal management.

2025-12-09

Q: What kind of ventilation is required in the operation workshop?

Answer: Ensure overall ventilation and local forced exhaust, especially in mixing and filling stations, to avoid the accumulation of volatile organic compounds (VOCs).

2025-10-14

Q: What should I do if I accidentally touch my skin or splash it in my eyes?

A: Rinse immediately with plenty of water for at least 15 minutes. Do not use a solvent (such as acetone) to clean the skin, which will accelerate the penetration of chemicals. Seek medical attention immediately with the product SDS.

2025-10-14

Q: What is the disposal of discarded adhesives and cleaning agents?

Answer: Unsolidified waste rubber and solvent belong to hazardous chemical waste, which should be handed over to qualified professional companies for treatment, and should not be dumped at will.

2025-10-14

Q: How to choose a bio-based or more environmentally friendly potting compound?

A: There are some epoxy resin systems based on renewable resources such as soybean oil in the market, but their comprehensive performance needs to be carefully evaluated to meet the application requirements.

2025-10-14

Q: What is the difference between UL94 V-0 and HB flame retardant ratings?

A: V-0 is the highest flame retardant grade, which will be extinguished within 10 seconds after flame removal and no burning material will fall. HB is the lowest grade, which can only burn slowly. The choice depends on the safety requirements of the product.

2025-10-14

Q: What is the difference in safety certification when products are exported to different countries?

Answer: In addition to UL (United States), certifications such as CE (Europe), CQC (China), and PSE (Japan) may also be required. Ensure that the selected adhesive has passed the corresponding certification tests.

2025-10-14

Q: How can I check whether the glue has passed a specific certification?

A: Ask the glue supplier directly for a copy of the UL yellow card or other certification, which will detail the approved evaluation and grade.

2025-10-14

Q: Why is some of the same products working and some of them are faulty?

Answer: Process fluctuations are the cause. Investigation: ① Check if environmental temperature and humidity remain constant; ② Verify if mixing time and method are consistent; ③ Confirm if adhesive equipment parameters have drifted; ④ Ensure uniform surface cleanliness of components.

2025-10-14

Q: Did the problem occur after replacing the same glue from the supplier?

The answer is: "same class" but different quality. Even if the basic resin is the same, slight differences in fillers, additives and formula ratios may lead to changes in process and performance. A comprehensive re-verification must be carried out.

2025-10-14

Q: Is it normal for potting compound to be severely layered after storage for a period of time?

Answer: The sedimentation of filler is a normal physical phenomenon, and it should be fully stirred before use. However, if the material can not be restored to uniform after stirring, or hard precipitation occurs, the material may have deteriorated.

2025-10-14

Q: Why is the viscosity of high thermal conductive potting compound very large?

A: In order to achieve high thermal conductivity, a large amount of thermal conductive filler (such as alumina, boron nitride) is needed. A high filler content will inevitably lead to an increase in viscosity. This is the result of trade-off.

2025-10-14

Q: How to repair minor defects on a cured surface (e.g., shrinkage holes, orange peel)?

Answer: For high appearance requirements, after initial curing, a small amount of newly prepared glue of the same type can be used for local repair and scraping, and then cured again.

2025-10-14

Q: Why does transparent potting compound show "fluorescence" after curing?

2025-10-14

Q: What if the glue doesn't flow in low temperatures?

A: Do not heat the glue directly! The glue should be transferred to a warm environment for at least 24 hours in a sealed state, and fully mixed before use. Rapid heating will cause moisture absorption and performance problems.

2025-10-14

Q: How do you measure the actual reaction temperature of the mixed glue?

Answer: Put the mixed glue into a disposable cup, insert the thermocouple thermometer, and record its temperature change curve, which can intuitively understand the peak heat release and curing process.

2025-10-14

Q: What if the "shadow area" of the potting compound does not cure?

A: Some UV-cured or photothermal dual adhesives cannot be cured in the area blocked by components. Ensure that there is no shielding in the design, or choose products with pure thermal curing or anaerobic curing.

2025-10-14

Q: What is the systematic way to finally solve the problem?

Answer: The six dimensions of human, machine, material, method, environment and measurement are investigated one by one. Record all parameters, make comparative experiments with a variable change, and work closely with suppliers are the most effective path.

2025-10-14

Q: What is RTV2 liquid silicone?

A: It's a two-component, room-temperature vulcanizing silicone rubber, consisting of component A (base rubber) and component B (curing agent). Once mixed, it cures into an elastomer at room temperature.

2025-10-16

Q: What does "RTV" mean?

A: Room Temperature Vulcanizing (RTV) means it cures without heating.

2025-10-16

Q: What is the difference between "liquid silicone" and "solid silicone"?

A: Liquid silicone starts in a liquid state and is cast by casting; solid silicone (compounded rubber) starts in a solid state and is formed by compression molding. Liquid silicone is more suitable for precision casting and complex mold making.

2025-10-16

Q: What are the main types of RTV2 silicone?

A: It is mainly divided into two categories: condensation type and addition type.

2025-10-16

Q: What is medical-grade silicone?

A: Refers to silicone that has passed biocompatibility tests (such as USP Class VI, ISO 10993) and can be used in contact with human skin or mucous membranes.

2025-10-16

Q: What is the fundamental difference between condensation-type and addition-type silicone?

A: Condensation type releases byproducts (such as alcohol) during curing and has slight shrinkage; addition type releases no small molecules, is dimensionally stable, and has zero shrinkage.

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Q: How do I choose between condensation-type and addition-type silicone?

A: Choose addition type for high requirements for dimensional accuracy, heat resistance, and strength; choose condensation type for cement or gypsum molds or when budget is limited.

2025-10-16

Q: What is food-grade silicone?

A: Refers to silicone that has passed relevant food safety certifications (such as FDA and LFGB) and is suitable for direct food contact.

2025-10-16

Q: What does the "hardness" of silicone mean, and how is it expressed?

A: Refers to the degree of hardness of silicone, usually expressed in Shore A hardness (Shore A), with higher numbers indicating harderness.

2025-10-16

Q: What is the common hardness range of silicone?

A: Shore A hardness typically ranges from very soft (0A) to medium hardness (40A). Common mold glue hardnesses are between 20A and 30A.

2025-10-16

Q: What does the "viscosity" of silicone mean?

A: It refers to the flow resistance of silicone. The lower the viscosity, the better the fluidity, and the more suitable it is for casting complex and delicate molds.

2025-10-16

Q: What are high-viscosity and low-viscosity silicones suitable for?

A: Low viscosity is suitable for precise, detailed molds; high viscosity is suitable for vertical brushing or applications requiring flow resistance.

2025-10-16

Q: What is the "working time" of silicone?

A: This refers to the time from mixing completion to when the silicone's viscosity increases to the point where it cannot be poured smoothly.

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Q: What is the "curing time" of silicone?

A: This refers to the time from mixing completion to when the silicone fully cures and reaches usable physical properties.

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Q: What factors affect the working time and curing time?

A: Mainly affected by environmental temperature and humidity, the higher the temperature, the shorter the time.

2025-10-16

Q: What is the "tear strength" of silicone?

A: This refers to the silicone's ability to resist tearing and damage. The higher the strength, the more durable the mold and its lifespan.

2025-10-16

Q: What is the "tensile strength" of silicone?

A: This refers to the maximum force per unit area that the silicone can withstand when it is pulled apart.

2025-10-16

Q: Are all silicones heat-resistant?

A: No, but most RTV2 silicone has a certain degree of high temperature resistance (usually above 200 ℃), which depends on the product parameters.

2025-10-16

Q: How can I find the specific technical parameters of a silicone rubber?

A: Request the Material Safety Data Sheet (MSDS) and Technical Data Sheet (TDS) of the product from the supplier.

2025-10-16

Q: Why is color paste usually added to mold silicone?

A: Convenient to observe whether the mixture is uniform; Distinguish between different batches of molds; Reduce the difficulty of bubble recognition.

2025-10-16

Q: How is cured potting compound recycled?

A: Recycling is very difficult. It is usually treated as electronic waste (E-Waste). Silicone rubber is relatively more environmentally friendly, but there is no large-scale recycling scheme at present.

2025-10-14

Q: Are there any halogen-free requirements?

Answer: For high-end communication and medical equipment, chlorine (Cl) and bromine (Br) content is usually required to be less than 900ppm, and the sum is less than 1500ppm. Halogen-free potting compound should be selected.

2025-10-14

Q: Does the potting compound comply with RoHS and REACH regulations?

A: Most modern electronic adhesives are compliant. However, the latest version of the Material Safety Data Sheet (SDS) and Certificate of Conformity (CoC) must be obtained from the supplier.

2025-10-14

Q: How to design a potting mold?

Answer: The material is usually aluminum alloy (good heat dissipation) or bakelite. The flow channel and exhaust groove should be designed, the demolding slope should be considered, and the mold material that does not stick to the potting compound should be selected or the release agent should be ...

2025-10-14

Q: How can the glue at the bottom of the barrel be used effectively?

A: Use a piston pressure tank to squeeze out almost all of the glue and reduce waste. For barrel glue, it is recommended to sacrifice the last part to avoid using sediment.

2025-10-14

Q: How to monitor the stability of the dispensing process?

Answer: Install a visual inspection system to monitor the amount of glue, or use a weight scale to regularly spot check the weight of a single glue application for SPC control.

2025-10-14

Q: How can small batch and multi-variety production improve the efficiency of changing lines?

A: Use quick connectors to connect the glue pipeline, and prepare a spare metering pump and mixing head, which can quickly switch between different glues.

2025-10-14

Q: How to clean a static mixing pipe?

A: For glue with long pot life, rinse it immediately after use with a cleaning agent. For cured glue, it can only be discarded as a consumable. It cannot be cleaned and reused.

2025-10-14

Q: How to ensure the consistency of glue application when the viscosity of glue changes greatly with temperature?

Answer: Add a constant temperature control system to the glue equipment, and heat the glue barrel, pressure tank, glue tube and even needle to stabilize the viscosity.

2025-10-14

Q: How to calibrate the mixing ratio of a two-component dispensing machine?

Answer: A and B components are respectively sprayed out for a certain period of time, weighed, the actual vomiting rate is calculated, and the equipment parameters are adjusted to ensure the accuracy of the proportion.

2025-10-14

Q: How to choose between pressure tank filling and pump filling?

Answer: Pressure tank is suitable for low viscosity, long pot life glue, low cost. Pump (gear pump, screw pump) is suitable for high viscosity, short pot life glue, more accurate measurement, more flexible control.

2025-10-14

Q: How to prevent leakage of glue valve during automatic glue filling?

Answer: Select a glue point valve with suck back function. When the glue is stopped, the piston will pull back to cut off the glue and effectively prevent leakage.

2025-10-14

Q: How to choose the specification and length of a static mixing pipe?

Answer: It depends on the viscosity of the glue, the mixing ratio and the amount of spit out. The larger the length-to-diameter ratio (L/D), the better the mixing effect, but the greater the back pressure. It needs to be matched with the glue application equipment.

2025-10-14

Q: How to analyze the root cause of incomplete curing?

Answer: The degree of curing can be analyzed by differential scanning calorimetry (DSC), or the functional group reaction can be analyzed by Fourier transform infrared spectroscopy (FTIR) to find out whether it is proportional, mixed or the material itself.

2025-10-14

Q: What is the significance of the glass transition temperature (Tg) of potting compounds?

Answer: Tg is the temperature at which the material changes from glass state to high elastic state. Above Tg, the material becomes soft, the modulus drops sharply, and CTE changes. For products with high operating temperature, potting compounds with Tg higher than the highest operating temperature ...

2025-10-14

Q: Why does the potting compound bubble or delaminate after reflow soldering?

A: The moisture adsorbed inside or at the bottom of the potting compound vaporizes rapidly at high temperatures. Ensure that the PCB is fully baked and dried before potting, and choose a low-humidity adhesive.

2025-10-14

Q: How is long-term service life assessed?

Answer: The long-term use effect is simulated by accelerated aging test (such as high temperature, high humidity, temperature cycle), and the actual life is calculated by using Allenius model.

2025-10-14

Q: The metal parts are corroded after the salt spray test?

Answer: ① The potting compound itself has a high ion content; ② cracks in the potting compound or gaps between the shell and the potting compound lead to salt spray penetration. Select a low ion content, high sealing compound and ensure good adhesion.

2025-10-14

Q: How to detect hidden internal bubbles after curing?

A: Nondestructive testing can be performed using an X-ray fluoroscopy (X-ray) or ultrasonic scanning microscope (SAT).

2025-10-14

Q: The component pin breaks after vibration test?

A: The potting compound does not effectively buffer the vibration. The rigid rubber (epoxy) may transmit the stress to the pins. Select a flexible rubber that can absorb and dissipate the vibration energy to protect the pins.

2025-10-14

Q: Why does it become hard and brittle after high temperature storage?

A: The material has undergone overcuring (overcure) or oxidation aging. Select materials with more stable thermal aging performance and ensure that the storage temperature does not exceed their maximum continuous use temperature.

2025-10-14

Q: What should I do if the test cracks after hot and cold shock?

Answer: The CTE (thermal expansion coefficient) of the material does not match the components and PCB, and the material modulus is too high (too hard). Select a glue with good CTE matching, low modulus and high elasticity (such as silicone).

2025-10-14

Q: What should I do if the insulation drops after high temperature and humidity test (double 85 test)?

Answer: It is usually caused by the material absorbing moisture. Polyurethane glue is easy to absorb moisture, epoxy resin is second, silicone rubber has the best hydrophobicity. Select materials with strong hydrophobicity and pass IPX8 grade test.

2025-10-14

Q: What is the design of the glue path?

Answer: the glue should be injected from the lowest point of the circuit board, let the glue rise naturally, gradually wrap the components, so as to discharge air from the highest point and avoid trapped gas.

2025-10-14

Q: How is the potting compound resistant to oil pollution?

Answer: Silicone rubber is usually poor in oil resistance, contact with oil may swell, performance decline. Epoxy resin and some polyurethane oil resistance is better.

2025-10-14

Q: How to achieve a removable temporary potting protection?

A: There are specially designed peelable potting compounds (usually silicone or rubber system), which form a rubber solid after curing, and can be peeled off as a whole like peeling fruit when repaired.

2025-10-14

Q: What if the potting compound needs to be cut and wear resistant?

Answer: Ordinary potting compounds have soft surfaces. If wear resistance is required, special types (such as some polyurethane or modified epoxy) can be selected to form a high hardness coating after surface curing, or a wear-resistant coating can be added to the outer layer.

2025-10-14

Q: What should be paid attention to when potting products containing batteries?

A: Consider the permeability. Fully sealed rigid potting (such as epoxy resin) may trap the gas produced by the battery, resulting in bulging or even rupture. Flexible silicone has some permeability and is relatively safer, but it is best to consult the battery manufacturer.

2025-10-14

Q: Can potting compounds be used for products that are exposed to the sun for a long time outdoors?

Answer: Epoxy resin is prone to yellowing and powdering, so it is not recommended. It is recommended to choose organic silicone potting compound with excellent UV resistance, which can maintain elasticity and performance for a long time.

2025-10-14

Q: What if the potting compound does not stick to the plastic shell (e.g., ABS, PC, Nylon)?

Answer: Many plastic surfaces have low adhesion and may contain residual release agents. Solutions: ① Thoroughly clean the plastic surface; ② Apply plasma or flame treatment to enhance adhesion; ③ Use a specialized primer (Primer).

2025-10-14

Q: How does potting compound affect the performance of high frequency circuits?

Answer: The dielectric constant (Dk) and loss factor (Df) of potting compounds are critical. Select materials with low and stable Dk and Df values (e.g., specific silicone gels) to reduce signal transmission loss and interference.

2025-10-14

Q: What if stress is applied to sensitive components (e.g., sensors, MIC)?

Answer: Avoid using epoxy resin with high hardness and high shrinkage rate. Select silicone rubber with low modulus and high elasticity, which can better absorb stress and protect sensitive parts.

2025-10-14

Q: Will potting compound corrode delicate gold-plated wires or chips?

Answer: It is possible. The acidic curing system or residual ionic impurities (chlorine, sulfur) of some epoxy resins may cause corrosion to gold, copper and other metals in high temperature and humidity environment. Select electronically neutral, high purity, and corrosion test electronic grade ...

2025-10-14

Q: What if there is no solution?

Answer: Step 1: Record the details (glue model, batch number, ratio, ambient temperature and humidity, operation process, abnormal phenomenon). Step 2: Contact your glue supplier's technical support staff immediately and provide the above information. They will have the most experience to solve your ...

2025-10-14

Q: The weight of the product increases too much after potting?

Answer: You can choose a lighter and less dense potting compound, or optimize the potting chamber design to reduce the amount of glue.

2025-10-14

Q: Can glue be dyed?

A: Yes, but you must use the special color paste recommended or provided by the glue manufacturer. Ordinary pigment may affect the curing reaction.

2025-10-14

Q: The transparent sealant is cloudy?

Answer: The reasons are: ① mixing in a large number of small bubbles; ② reaction with water in the environment; ③ high curing temperature; ④ poor compatibility between A/B components.

2025-10-14

Q: How to improve the thermal conductivity of thermal adhesive?

Answer: Select the model filled with higher thermal conductivity filler (such as boron nitride, alumina), and ensure that the colloid is dense and bubble-free after construction.

2025-10-14

Q: How to choose the viscosity of glue?

Answer: Low viscosity: suitable for products with complex potting structure and dense components, with good leveling. High viscosity: suitable for simple potting structure or vertical coating, which is not easy to flow.

2025-10-14

Q: What is the difference between winter and summer operations?

Answer: Winter: low temperature, high viscosity, poor leveling, slow curing, need to preheat or temperature curing. Summer: high temperature, Pot Life shortened, fast curing, need to control the mixing amount and cooling.

2025-10-14

Q: How do you test the performance of a cured colloid?

Answer: Standard samples can be made for hardness (Shaw), strength, thermal conductivity, insulation strength, TG point and other tests, and compared with the data sheet.

2025-10-14

Q: Is potting compound harmful to human body? How to protect?

A: Protective gloves and goggles should be worn during operation. It should be carried out in a well-ventilated place to avoid direct skin contact and inhalation of volatiles. Refer to the Material Safety Data Sheet (MSDS).

2025-10-14

Q: Component B (curing agent) darkens?

A: For amine curing agents, exposure to air oxidation will turn yellow and dark, which may mean that the activity is reduced. It should be carefully tested before deciding whether to use them.

2025-10-14

Q: Does component A (base glue) thicken or form lumps?

A: It may have absorbed moisture or partially pre-polymerized. It is recommended to stop using it.

2025-10-14

Q: How should glue be stored?

Answer: Store in a sealed, cool and dry place, avoid direct sunlight. Some curing agents need to be stored in cold storage (see product instructions), and should be restored to room temperature before use to prevent moisture absorption.

2025-10-14

Q: How to clean the filling equipment and tools?

A: Clean immediately with the corresponding solvent (e.g., alcohol, acetone, special cleaning agent) before curing. Once cured, it can only be removed mechanically.

2025-10-14

Q: The automatic glue pump is not pumping smoothly or blocked?

Answer: The reasons are as follows: ① The viscosity of the glue is too high, which is not suitable for the equipment; ② The sediment of the filler clogs the pipeline; ③ The pot life has passed, and the glue in the pipeline begins to solidify; ④ The pipeline or valve is not cleaned.

2025-10-14

Q: Rainbow or oil spots appear on the surface of the colloid?

Answer: It is usually caused by slight surface precipitation (oil discharge) or reaction with external pollutants (such as hand sweat, detergent), which generally does not affect the deep performance.

2025-10-14

Q: How do I remove/maintain a sealed component?

Answer: Epoxy resin: hard and brittle, can be locally heated and chiseled with mechanical methods, but it is easy to damage the components; silicone rubber: elastomer, can be completely cut and excavated with a knife, good protection for the components; polyurethane: between the two.

2025-10-14

Q: Why is secondary curing needed?

A: In order to achieve the best performance, some adhesives (especially epoxy) need to be "post-cured" (Post Cure) in a high temperature oven for a period of time after initial curing at room temperature.

2025-10-14

Q: Why does colloid have an odor?

A: Some chemical adhesives (such as some polyurethane and epoxy) have a slight odor during the initial curing, which usually dissipates after a period of time. If the odor is strong and persistent, it may be incomplete curing or material deterioration.

2025-10-14

Q: Can't meet the flame retardant rating (UL94)?

Answer: The reasons are: ① incomplete curing; ② uneven distribution of flame retardant caused by filler settlement; ③ too thin adhesive layer.

2025-10-14

Q: The heat conduction effect is not as good as expected?

Answer: The reasons are as follows: ① Poor contact between the colloid and the heat source, with air gap; ② There are bubbles inside after curing, which destroy the heat conduction path; ③ Uneven heat conduction caused by the sedimentation of filler.

2025-10-14

Q: Reduced electrical insulation performance?

Answer: The reasons are: ① bubbles and impurities in the gel; ② moisture absorption (especially polyurethane); ③ incomplete curing; ④ performance attenuation in high temperature and humidity environment.

2025-10-14

Q: Yellowing and aging of colloids?

Answer: The reasons are as follows: ① Epoxy resin itself has poor ultraviolet resistance and is prone to yellowing under the sun; ② it is in a high temperature environment for a long time; ③ the material has poor oxidation resistance.

2025-10-14

Q: Damage of components after potting (e.g., capacitor burst, chip failure)?

Answer: Reasons: ① Excessive curing stress of adhesive (common in epoxy resin); ② High temperature during curing heat release; ③ Corrosiveness of the adhesive itself (acidic curing system); ④ Poor component sealing, allowing adhesive infiltration.

2025-10-14

Q: Colloid and shell/components delamination (poor adhesion)?

Answer: Reasons: ① Material mismatch (e.g., silicone sealant has poor adhesion to many plastics); ② Oil stains, release agents, or dust on the surface of the adherend; ③ Failure to use an appropriate primer; ④ Stress shrinkage during curing.

2025-10-14

Q: Why does the curing speed of dark rubber and light rubber differ after mixing?

A: It is possible. Dark fillers (such as carbon black) have strong heat absorption, which may lead to slightly higher curing temperature and faster curing speed.

2025-10-14

A layer of oil is left on the mold after demolding?

Answer: It is usually the plasticizer in the glue or the exudation of small molecules that are not completely reacted (exudation), which may be related to incomplete curing or mold material.

2025-10-14

Does the solidified colloid become soft and not strong enough?

Answer: Reasons: ① Incorrect mixing ratio (insufficient curing agent); ② uneven mixing; ③ incomplete curing (temperature is not enough or time is not enough); ④ wrong selection, the material itself.

2025-10-14

What is the future development trend of silicone gel technology?

Key trends include: Higher thermal conductivity: Developing products with thermal conductivity exceeding 4.0 W/m·K. Higher performance: Striving for long-term stability at extreme temperatures (-60°C to 250°C). Easier processing: Developing products with faster curing and lower viscosity without ...

2025-09-11

What impact does discarded, cured silicone gel have on the environment?

Cured silicone gel is chemically inert and not considered hazardous waste. It does not biodegrade, but it also does not leach harmful substances into the soil or groundwater. Disposal is similar to that of standard plastics, allowing specialized companies to landfill or physically recycle it (e.g., ...

2025-09-11

Are there silicone gels that can be cured with UV-directed heat?

Yes, this is an advanced process. Certain silicone gel formulations can be initially positioned (set) within seconds using UV irradiation, preventing the glue from flowing before subsequent heat curing. Heat is then used to achieve a final, deep cure. This is particularly useful for products ...

2025-09-11

Can silicone gel be used in conjunction with thermal interface materials (TIMs)?

Yes, this is a common and efficient heat dissipation solution. For example, first attach a high-performance thermal pad (gap pad) or apply thermal grease to the CPU chip to ensure optimal thermal contact with the casing, and then fill the entire cavity with thermal conductive silicone gel to achieve ...

2025-09-11

How to evaluate the performance of silicone gel in long-term vibration environment?

Verification requires random vibration testing and sine-swept vibration testing. Both potted and unpotted samples are tested simultaneously, comparing changes in natural frequency and electrical performance after vibration. High-quality silicone gel significantly dampens vibration, preventing solder ...

2025-09-11

Is silicone gel sensitive to oxygen during the curing process?

Yes, when addition-reactive silicone gels come into contact with air (oxygen) during curing, the reaction will be inhibited, resulting in surface tack (known as "oxygen inhibition"). This is not an incomplete cure; it's normal. Surface tack can be eliminated by heating or using a nitrogen blanket. ...

2025-09-11

How to achieve "local potting" or "selective potting" of silicone gel?

This requires precise programming of the dispensing path. Using high-precision two-component dispensing equipment, it is possible to precisely dispense glue only to the core areas of the PCB that need protection (such as specific chips and transformers) just like "drawing a picture", thus saving ...

2025-09-11

How does silicone gel help improve the reliability of high voltage products?

In high-voltage applications (e.g., >1000V), silicone gel's excellent dielectric strength and tracking resistance effectively prevent air ionization (corona) and high-voltage arc breakdown. Its fluidity completely fills all air gaps between high-voltage terminals, eliminating partial discharge and ...

2025-09-11

What is “low volatility” silicone gel and why is it so important in aerospace and optics?

Low Volatile silicone gels are specially treated to contain extremely low levels of volatile siloxanes. The small siloxane molecules in ordinary silicone gels can evaporate slowly and condense on delicate optical components (such as sensors and lasers) or in vacuum environments, causing contaminatio...

2025-09-11

How to measure and select the hardness (Shore 00) of silicone gel?

The extremely soft properties of silicone gel are measured using a Shore OO durometer rather than the more commonly used Shore A scale, with readings typically ranging from 10-60 Shore OO. The lower the number, the softer the material. The principle of selection is: for components that are more ...

2025-09-11

What are the most important factors to consider when choosing silicone gel?

Comprehensive considerations include: Hardness (Shore 00 or Shore A): Determines stress absorption capacity. Viscosity: Determines processability and permeability. Thermal conductivity: Determines heat dissipation requirements. Potency/curing time: Determines production cycle time. Electrical ...

2025-09-11

In electric vehicle motor controllers, what exactly does silicone gel protect?

It mainly protects the control board (PCB), current sensor, capacitor and the drive and control parts of the IGBT power module from vibration, thermal stress, condensation and chemical corrosion.

2025-09-11

What is the long-term aging performance of silicone gel? What are the common aging test items?

Excellent long-term aging performance. Common accelerated aging tests include high temperature storage (HTS), temperature cycling (TC), high temperature and humidity testing (THB), and power temperature cycling (PTC), which simulate performance retention after years of use.

2025-09-11

How do I remove uncured silicone gel from equipment and tools?

Before the glue is cured, it can be cleaned by wiping with alcohol or acetone. Once it is cured, mechanical removal is the main method, and professional silicone removers can also be used.

2025-09-11

Can silicone gel be used to encapsulate products containing finely tuned components?

Yes, but its extremely low stress properties are a key advantage. It won’t squeeze or move fine-tuning components (e.g., adjustable inductors, potentiometers) like a harder material would, keeping them in place and protecting them in their optimal position.

2025-09-11

After silicone gel encapsulation, it was found that some parts were not cured. What could be the possible reason?

The main causes may be: Uneven mixing: Components A and B are not fully mixed. Proportion error: The mixing ratio is inaccurate. Catalyst poisoning: Contact with substances containing sulfur, phosphorus, amines, etc. (such as certain rubbers, flux residue, and epoxy resin). Local temperature is too ...

2025-09-11

Why is silicone gel said to have excellent resistance to thermal shock?

Due to its extremely low modulus (very soft) and extremely high elongation, its coefficient of thermal expansion (CTE) matches well with a variety of materials. Under severe temperature cycles (such as -40°C to 125°C), it can absorb the stress of thermal expansion differences between different ...

2025-09-11

What is the typical volume resistivity of silicone gel?

Silicone gel is an excellent insulating material with a typically very high volume resistivity, ranging from 1.0×10¹⁵ to 1.0×10¹⁶ Ω·cm, which effectively ensures the insulation safety of circuits.

2025-09-11

Can I add color to silicone gel?

Yes. Silicone gels are available in a variety of colors, and custom colors can be created by adding specialized silicone colorants. Common colors include transparent, black, white, and gray, which are used to distinguish product models or conceal internal components.

2025-09-11

How much will the product weight increase after silicone gel potting?

Weight gain is determined by the density of the silicone gel (typically 1.0-1.2 g/cm³) and the potting volume. This can be estimated using the formula: Weight gain ≈ potting volume (cm³) × density (g/cm³). While the weight gain will be greater relative to air, it's superior to many other potting ...

2025-09-11

Is silicone gel irritating to the skin before it cures?

Uncured silicone gel is generally less irritating, but it is still recommended to follow chemical handling regulations and wear protective gloves and goggles. In case of contact with skin, wash with soap and water. Avoid contact with eyes.

2025-09-11

How to test the airtightness of silicone gel potting products?

Silicone gel itself is not designed to provide an airtight seal because it has a certain degree of permeability. If the overall airtightness of the potting body needs to be tested, the product shell can be tested using helium mass spectrometry leak detection or pressure decay method.

2025-09-11

Can silicone gel be used outdoors or in environments with strong UV light?

Ordinary silicone gel has good weather resistance, but long-term exposure to strong UV rays may cause slight yellowing (this does not affect performance). If you have high requirements for appearance, you can choose a special type of silicone gel with added UV stabilizers to prevent yellowing.

2025-09-11

What are the advantages and disadvantages of thermal conductive silicone gel and thermal conductive gasket (Gap Pad)?

Advantages: Silicone gel can completely fill irregular gaps, eliminating interfacial contact resistance and achieving superior thermal conductivity. Automated potting is highly efficient and suitable for mass production. Disadvantages: It requires a mixing and curing process, which poses a risk of ...

2025-09-11

How does silicone gel perform in high temperature and high humidity environments (double 85 test)?

High-quality silicone gel performs exceptionally well in an 85°C/85%RH (double 85% test) environment. Its hydrophobicity and chemical inertness effectively resist moisture intrusion, preventing circuit corrosion and maintaining stable electrical insulation and physical properties over the long term....

2025-09-11

How to evaluate the adhesion of silicone gel to metal/plastic housing?

Quantitative evaluation is usually performed through tensile shear strength testing or 90°/180° peel testing. If adhesion is insufficient, it can be significantly improved through plasma treatment, flame treatment, or application of a dedicated silane coupling agent (primer).

2025-09-11

Is silicone gel compatible with conformal coatings on PCBs?

Careful testing is required. Silicone gel may be incompatible with certain types of conformal coatings (such as acrylics and polyurethanes), causing the conformal coating to wrinkle or dissolve, or the silicone gel to not cure. It is recommended to use a silicone-based conformal coating in areas ...

2025-09-11

What is the "working time" and "curing time" of silicone gel?

Pot Life: This refers to the time it takes for the viscosity of components A and B to double after mixing (usually measured at 25°C). The adhesive must complete encapsulation within this time. Cure Time: This refers to the time it takes for a colloid to fully cure into an elastomer at a specific ...

2025-09-11

What is the curing shrinkage rate of silicone gel?

Addition-curing silicone gels have an extremely low cure shrinkage, typically less than 0.1%. This means they generate virtually no internal stress during the curing process, preventing shrinkage from pulling on sensitive components or causing cracks in the package.

2025-09-11

What is the viscosity range of silicone gel? How should I choose the viscosity based on the product structure?

Silicone gels have a wide viscosity range, from a few hundred mPa·s to tens of thousands of mPa·s. For PCBs with complex structures and tiny gaps, low-viscosity products (e.g., 500-2000 mPa·s) should be selected to ensure good leveling and permeability. For large, simple cavities or areas requiring ...

2025-09-11

Is silicone gel environmentally friendly?

Silicone gel itself is chemically stable and non-toxic. Its curing process is an addition reaction that does not produce any volatile organic compounds (VOCs), making it an environmentally friendly material.

2025-09-11

How to determine whether silicone gel is fully cured?

You can check to see if the surface is still sticky (not fully cured) by touching it, or use an instrument such as Fourier Transform Infrared Spectroscopy (FTIR) to detect changes in characteristic absorption peaks. The simplest method is to follow the curing conditions (temperature/time) provided ...

2025-09-11

Is silicone gel expensive?

Yes, silicone gel generally has higher raw material costs than traditional epoxy resins and polyurethanes. However, the high reliability, maintainability, and improved yield rate it brings make it an extremely cost-effective choice for high-end applications.

2025-09-11

What is the dielectric strength of silicone gel?

The dielectric strength (breakdown voltage) of typical electronic potting silicone gel is usually between 15-25 kV/mm, with excellent insulation properties, which can effectively prevent arc breakdown under high voltage.

2025-09-11

What are the storage requirements for silicone gel?

It should be sealed and stored in a cool and dry place (such as below 25°C), avoiding contact with moisture, catalyst poisons (such as compounds containing N, P, S) and high temperature to prevent the rubber from deteriorating or curing prematurely.

2025-09-11

What should I do if bubbles are generated during operation?

The mixed rubber material can be vacuum degassing first. If there are still bubbles after potting, the whole product can be placed in a vacuum box for a short time to allow the bubbles to be discharged to the surface and burst.

2025-09-11

What should we pay attention to in the mixing and filling process of silicone gel?

Ensure that components A and B are thoroughly and evenly mixed in the recommended ratio; otherwise, the material may not cure or experience performance degradation. It is recommended to use a two-component dispensing machine for automated operation to ensure mixing quality and production efficiency. ...

2025-09-11

How to choose silicone gel with appropriate thermal conductivity?

Choose based on power density and heat dissipation requirements: General circuit protection: Approximately 0.2 W/m·K is sufficient. Medium-heat-generating devices (such as MOSFETs and ICs): 1.0-1.5 W/m·K is recommended. High-power modules (such as IGBTs): High thermal conductivity products with a ...

2025-09-11

What materials are corrosive to silicone gel?

Addition-type silicone gels may inhibit the curing of materials such as soft brass, silver-plated layers, and polycarbonate (PC), resulting in non-curing. Be sure to confirm compatibility with the supplier before use, or choose a specially formulated silicone gel that addresses these issues.

2025-09-11

What treatments are required on components before pouring silicone gel?

Make sure the components and PCB are clean, dry, and free of grease. For some plastic housings, a primer may be required to enhance the adhesion of the silicone gel to the substrate.

2025-09-11

What electronic products are silicone gels mainly used in?

Widely used in: New energy vehicles: Battery management systems (BMS), onboard chargers (OBC), drive motor controllers, and DC-DC converters. Photovoltaic inverters: Protecting core control boards and power modules. Aerospace/military electronics: Sensors and controllers requiring extremely high ...

2025-09-11

If the silicone gel is damaged after curing, can the component be repaired?

Yes! This is a major advantage of silicone gel. Due to its elastomeric properties, it can be cut directly into the gel with tools to remove the component that needs to be replaced for repair. After the repair, new silicone gel can be re-injected, which is impossible with hard thermosetting plastics ...

2025-09-11

What is the curing process of silicone gel?

Silicone gels are typically two-component (A + B) liquids that cure by heating. After mixing, they have a long pot life at room temperature, but cure rapidly (30 minutes to 1 hour) when heated (e.g., to 80-120°C). This is an addition reaction, resulting in no byproducts and minimal shrinkage.

2025-09-11

Is silicone gel flame retardant?

Yes, most electronic-grade silicone gels are UL94 V-0 certified, which means they have good flame retardant properties and improve the safety of electronic products.

2025-09-11

What is the thermal conductivity of silicone gel?

The thermal conductivity of ordinary silicone gel is low (about 0.1-0.3 W/m·K), but there are a large number of thermally conductive silicone gels on the market. By adding fillers such as aluminum oxide and boron nitride, the thermal conductivity can reach 1.0-3.0 W/m·K or even higher, meeting the ...

2025-09-11

How does silicone gel help protect sensitive chips and bond wires?

Its soft properties can wrap and fix the chip and tiny gold/aluminum wires, acting like an "air cushion" to buffer external vibrations and shocks, preventing the bonding wires from breaking or short-circuiting due to friction with hard materials.

2025-09-11

What is the typical temperature range of silicone gel?

High-quality electronic potting silicone gels typically maintain stable performance over a temperature range of -50°C to +200°C, and some special formulas can even withstand higher temperatures for a short period of time.

2025-09-11

Why is silicone gel particularly suitable for use in areas requiring high reliability?

Because it has excellent high and low temperature resistance (usually -50℃ to above 200℃), excellent electrical insulation performance, chemical inertness (weather resistance, moisture resistance, corrosion resistance) and long-term stability, it can ensure that electronic equipment can work stably ...

2025-09-11

What are the most prominent advantages of silicone gel?

Its most prominent advantages are its extremely low stress and excellent flexibility. It can effectively absorb mechanical and thermal stresses caused by temperature changes, vibration, or shock, protecting fragile electronic components (such as chips and bonding wires) from cracking and delaminatio...

2025-09-11

What is silicone gel for electronic potting? What is the fundamental difference between it and epoxy resin and polyurethane?

Silicone gel for electronic potting is a two-component, addition-forming liquid silicone rubber based on silicone rubber. The fundamental difference lies in its form after curing: silicone gel remains soft, jelly-like (gel), while epoxy resin is very hard after curing, and polyurethane is somewhere ...

2025-09-11

Why does the curing process release a lot of heat and even smoke?

The reasons are as follows: ① Too large amount of mixing at one time, poor heat dissipation leads to "explosion"; ② high ambient temperature; ③ the product itself reacts with intense heat release.

2025-09-09

The curing time is much longer than the instructions?

The reasons are: ① too low ambient temperature; ② reduced activity of curing agent (partial failure); ③ wrong mixing ratio (less curing agent).

2025-09-09

Uneven color or stripes after curing?

The reasons are as follows: ① A/B components are not fully mixed; ② The filler is seriously precipitated and not mixed separately before use; ③ Different batches of rubber mixing are used.

2025-09-09

Cracking after gel solidification?

Reasons: ① Internal components or pins have sharp edges, stress concentration; ② excessive shrinkage of the cured adhesive; ③ mismatch between the base material and the thermal expansion coefficient (CTE) of the adhesive; ④ too high curing temperature or rapid heating.

2025-09-09

Are there bubbles inside after curing?

Reasons: ① Air is mixed in during mixing and not removed; ② Improper injection method causes excessive foaming; ③ Rapid curing speed leaves no time for bubbles to escape; ④ Excessive viscosity of the material itself; ⑤ For polyurethane, it may be due to moisture in the raw materials or environment....

2025-09-09

The surface of the colloid is sticky and sticks to your hands?

Possible causes: ① Mixing ratio deviation (usually due to insufficient curing agent); ② Inadequate mixing; ③ Silicone adhesive exposure to oxygen in the air (common in silicone adhesives, known as "oxygen inhibition", with normal deep curing); ④ Excessive humidity in the curing environment.

2025-09-09

glue does not cure for a long time or locally?

Main reasons: ① Incorrect mixing ratio; ② Inadequate mixing; ③ Incorrect material selection for components A/B; ④ Insufficient curing temperature; ⑤ Failure of one component (especially the curing agent).

2025-09-09

Can different batches of glue be mixed?

It is not recommended. There may be slight differences in color and viscosity between different batches, and mixing may lead to inconsistent appearance after curing.

2025-09-09

How to extend the operable time?

The ambient temperature can be reduced or the container containing the rubber can be cooled by using a freezer tray (ice bag). However, it should not be lower than its minimum operating temperature.

2025-09-09

What is the difference between Pot Life (operational time) and Cure Time (curing time)?

Pot Life is the time it takes for the mixed gel to remain flowable and operable; Cure Time is the time it takes to achieve full curing (with final performance) at a given temperature. Pot Life is much shorter than cure time.

2025-09-09

What happens if you mix too much glue?

The reaction begins after the mixing of two-component glue, and the heat is concentrated. A large amount of mixing will lead to "polymerization explosion": the reaction temperature rises sharply, accelerating the curing, which may burn components, produce a large number of bubbles or even crack.

2025-09-09

What is the effect of working environment and vessel moisture?

Especially polyurethane glue, which is extremely sensitive to moisture. Moisture will react with it to produce CO₂ gas, resulting in the glue body filled with small bubbles after curing, and the performance is severely reduced. Ensure that the environment is dry and the container is dry.

2025-09-09

Is it necessary to shake off the foam after potting?

You can gently shake the PCB or potting mold to help the bubbles float to the surface and burst. However, the vibration should not be too large to avoid component displacement or small bubbles being dispersed more finely.

2025-09-09

What should I pay attention to when filling the glue?

Pour slowly along the wall of the container or use a drip machine to control the flow rate to avoid direct impact on sensitive elements and entanglement of too much air.

2025-09-09

What should I do if there are many bubbles in the mixed glue?

It can be left for a while for the large bubbles to escape by themselves. For the glue with high viscosity, vacuum degassing process (put the mixed glue into the vacuum chamber and extract the vacuum) can be used, which is the most effective method.

2025-09-09

How long should I stir?

Until the color and texture are completely uniform without any stripes (usually 2-3 minutes). Refer to the product technical specification for details.

2025-09-09

Which is better, manual or machine mixing?

For small batches or experiments, manual stirring should be thorough and scrape the sides and bottom. For large quantities of production, it is recommended to use mechanical stirring and static mixing tube, which is more efficient, more uniform mixing and avoid bubble entanglement.

2025-09-09

Why should group A and Group B be mixed separately before use?

Prolonged standing may lead to the precipitation of fillers (such as heat conduction powder, flame retardant) and uneven performance. Stirring can ensure the uniform distribution of each component and ensure the consistency of the final product performance.

2025-09-09

Can the mixing ratio of two-component potting compound be fine-tuned?

Absolutely not. The mixing ratio is a strict specification of the chemical reaction measurement, and even a small deviation will cause the cured material to be sticky, soft, insufficient strength or permanently not cured.

2025-09-09

How long is the shelf life of potting compound? Can it be used after expiration?

Usually 6-12 months, it should be stored in a cool and dry place. It is strongly not recommended to use expired glue, because it may have undergone partial pre-polymerization, resulting in incomplete curing, performance degradation and other risks.

2025-09-09

How much potting compound do I need? How to calculate?

Calculate the volume of the cavity to be filled (length × width × height), and take into account the volume occupied by components, leaving a margin of about 5-10%. Pay attention to the density of the glue when purchasing, and multiply the volume by the density to get the required weight.

2025-09-09

How to choose epoxy resin, silicone and polyurethane potting compound?

Epoxy resin offers high hardness, excellent insulation properties, and strong adhesion, but suffers from poor toughness and weak resistance to thermal shock. Silicone demonstrates superior elasticity, temperature tolerance, aging resistance, and electrical performance, though it has relatively ...

2025-09-09

Can RTV2 replicate fine textures in molds?

Yes, its low viscosity and self-leveling properties capture intricate details like fingerprints

2025-04-10

‌What surface preparation is required before pouring RTV2 silicone?

Clean the master model with isopropyl alcohol and apply a silicone-free release agent (e.g., PTFE spray) to ensure easy demolding‌

2025-04-10

How to choose between condensation-cure and addition-cure RTV2 for molds?

Condensation-cure (e.g., RTV-2) suits general-purpose molds, while addition-cure (platinum-catalyzed) is ideal for food-grade or high-detail applications due to zero byproduct release‌

2025-04-10

How to store RTV2 Liquid Silicone Rubber?

Store in airtight containers at 10–25°C (50–77°F) to extend shelf life.

2025-04-10

How to adjust RTV2 viscosity for specific applications?

Use thixotropic agents or solvents recommended by the manufacturer.

2025-04-10

Does RTV2 silicone shrink during curing?

Minimal shrinkage (0.1–0.5%) ensures dimensional accuracy.

2025-04-10

What is the mixing ratio for RTV2?

Common ratios are 1:1, 100:2,10:1, or custom ratios per supplier.

2025-04-10

What is the Shore hardness range for RTV2?

Typically Shore A 10–60.

2025-04-10

What is the curing time for RTV2 Liquid Silicone Rubber?

Cure times range from 4–24 hours, depending on formulation.

2025-04-10

Can RTV2 be used for injection molding?

Yes, low-viscosity RTV2 is compatible with injection molding.

2025-04-10

‌Is RTV2 suitable for food-grade molds?

Yes, FDA-compliant RTV2 is ideal for food-safe molds.

2025-04-10

What industries use RTV2 Liquid Silicone Rubber?

Automotive, medical, electronics, mold-making, and consumer goods.

2025-04-10

Can RTV2 withstand high temperatures?

Yes, RTV2 typically resists temperatures from -50°C to 200°C (-58°F to 392°F).

2025-04-10

‌Is RTV2 silicone rubber FDA-compliant?

Certain grades are FDA-approved for food-contact and medical applications.

2025-04-10

What are the key differences between RTV2 and LSR (Liquid Silicone Rubber)?

RTV2 cures at room temperature, while LSR requires heat for vulcanization.

2025-04-10

What does "RTV2" stand for?

"Room-Temperature Vulcanizing 2-component" silicone rubber.

2025-04-10

What is RTV2 Liquid Silicone Rubber?

RTV2 is a two-part, room-temperature-vulcanizing silicone rubber used for molds, prototypes, and industrial applications.

2025-04-10

Why does potting compound viscosity affect performance?

High-viscosity (>5,000 cP) potting compounds‌ trap air, while low viscosity risks component displacement.

2025-04-10

Can potting compounds shrink during curing?

Low-shrinkage (

2025-04-10

Are colored potting compounds available for branding?

Custom-color epoxy potting compounds‌ align with corporate branding in consumer products.

2025-04-10

How to reduce potting compound waste in production?

Pre-measured dual-cartridge potting compounds‌ minimize overfilling and material costs.

2025-04-10

Are halogen-free potting compounds available?

RoHS/REACH-compliant halogen-free potting compounds‌ eliminate toxic fumes in consumer electronics.

2025-04-10

Are there potting compounds for downhole drilling tools?

High-pressure-rated (10,000 psi) epoxy potting compounds‌ stabilize electronics in oil/gas exploration.

2025-04-10

Which potting compound is best for solar inverters?

UV-resistant, high-CTI (>400 V) potting compounds‌ ensure reliability in photovoltaic systems.

2025-04-10

What potting compounds suit EV battery packs?

Fire-retardant, thermally conductive potting compounds‌ (e.g., ‌Henkel Loctite EA 9400‌) manage heat in Li-ion cells.

2025-04-10

What is the pot life of polyurethane potting compounds?

‌30–60 minutes pot life‌ allows adjustment before gelation in complex molds.

2025-04-10

‌Are there room-temperature-cure potting compounds?

Two-part RTV silicone potting compounds‌ cure without heat for temperature-sensitive components.

2025-04-10

How to eliminate bubbles in thick potting layers?

Vacuum-degassed potting compounds‌ remove trapped air in high-thickness (>10 mm) encapsulations.

2025-04-10

Can potting compounds be applied via automated dispensing?

‌Low-viscosity potting compounds (500–1,000 cP)‌ enable precision robotic dispensing for mass production.

2025-04-10

‌What accelerates epoxy potting compound curing?

Thermal cure potting compounds‌ harden in 30 minutes at 80°C vs. 24 hours at room temperature.

2025-04-10

‌How to prevent moisture ingress in humid climates?

Hydrophobic silicone potting compounds‌ achieve

2025-04-10

‌Are there potting compounds for acidic environments?

PTFE-reinforced potting compounds‌ endure pH 1–14 in chemical processing equipment.

2025-04-10

‌Do potting compounds degrade in UV light?

Acrylic-modified epoxy potting compounds‌ resist yellowing and cracking in solar panel junction boxes.

2025-04-10

Can potting compounds withstand salt spray exposure?

‌IP68-rated marine-grade potting compounds‌ prevent corrosion in offshore energy systems.

2025-04-10

Are there fuel-resistant potting compounds?

‌Fluorosilicone potting compounds‌ resist gasoline, diesel, and hydraulic fluids in automotive sensors.

2025-04-10

How to prevent corona discharge in potting compounds?

Use ‌void-free potting compounds‌ with low ion content (

2025-04-10

Do potting compounds support high-voltage DC applications?

Silicone potting compounds with 25 kV/mm dielectric strength‌ protect EV charging systems.

2025-04-10

What makes a potting compound electrically insulating?

High-purity ‌epoxy potting compounds‌ achieve ‌>30 kV/mm dielectric strength‌ for transformer encapsulation.

2025-04-10

Can potting compounds reduce EMI in sensitive electronics?

Ferrite-loaded EMI shielding potting compounds‌ absorb electromagnetic interference in 5G devices.

2025-04-10

How to select thermally conductive potting compounds?

Opt for ‌alumina-filled potting compounds‌ with ‌thermal conductivity > 2.0 W/m·K‌ for power inverters and motor drives.

2025-04-10

What is the dielectric constant of epoxy potting compounds?

Epoxy potting compounds typically have a ‌dielectric constant of 3.5–4.5‌ at 1 MHz, suitable for RF shielding

2025-04-10

Are there optically clear potting compounds for LEDs?

UV-stable silicone potting compounds‌ maintain >95% light transmission in LED arrays and displays.

2025-04-10

How do low-CTE potting compounds prevent cracking?

Low coefficient of thermal expansion (‌CTE < 20 ppm/°C‌) minimizes stress in PCB potting under thermal cycling.

2025-04-10

Why choose flame-retardant potting compounds?

‌UL 94 V-0 compliant potting compounds‌ prevent ignition in power modules and EV battery systems.

2025-04-10

‌What defines a high-temperature potting compound?

High-temperature potting compounds (e.g., ‌silicone-based potting compounds‌) withstand up to ‌200°C‌, ideal for automotive and aerospace electronics.

2025-04-10

Can potting compounds seal underwater electronics?

Waterproof grades with ‌IP68 ratings‌ protect marine sensors and subsea connectors ‌

2025-04-10

Which potting compound is best for LED modules?

Optically clear silicones maintain light transmission while resisting yellowing ‌

2025-04-10

‌Do potting compounds emit toxic fumes?

Low-VOC, non-flammable silicones and polyurethanes ensure workplace safety ‌

2025-04-10

‌Are halogen-free potting compounds available?

Yes, eco-friendly formulations meet ‌RoHS‌ and ‌REACH‌ standards for consumer electronics ‌

2025-04-10

How to avoid air bubbles during potting?

Degas high-viscosity compounds under vacuum or use low-pressure dispensing systems ‌

2025-04-10

What accelerates potting compound curing time?

Thermal curing at ‌60–80°C‌ reduces epoxy setting to

2025-04-10

How do potting compounds perform in UV-exposed environments?

UV-stable silicones and acrylic-modified epoxies prevent yellowing and degradation outdoors ‌

2025-04-10

‌Are there potting compounds resistant to fuels and oils?

Fluorosilicone and hydrocarbon-resistant polyurethane protect automotive sensors and fuel systems ‌

2025-04-10

Do potting compounds shield against electromagnetic interference (EMI)?

Conductive fillers like carbon or metal particles enhance EMI shielding in specialized formulations ‌

2025-04-10

‌Why choose potting compounds with high dielectric strength?

Dielectric ratings ‌>20 kV/mm‌ (e.g., epoxy) prevent arcing in high-voltage transformers and power systems ‌

2025-04-10

What is the maximum operating temperature for epoxy potting compounds?

Standard epoxy resists up to ‌120–150°C‌; high-temperature grades tolerate ‌180°C‌ ‌

2025-04-10

Can potting compounds withstand thermal cycling?

Silicone-based compounds excel in environments with rapid temperature fluctuations due to low thermal expansion ‌

2025-04-10

How to improve heat dissipation with potting compounds?

Use ‌thermally conductive potting compounds‌ filled with ceramic or silica additives for efficient heat transfer ‌

2025-04-10

What are semi-flexible potting compounds?

These hybrid formulations balance flexibility and rigidity, maintaining electrical insulation across wide temperature ranges

2025-04-10

Are polyurethane potting compounds suitable for vibration resistance?

Yes, polyurethane’s elastomeric properties absorb mechanical stress, ideal for automotive and industrial electronics ‌

2025-04-10

What is the difference between epoxy and silicone potting compounds?

Epoxy potting compounds offer high rigidity and adhesion strength, while silicone variants provide flexibility and thermal stability up to ‌200°C‌ ‌

2025-04-10

‌Can potting compounds seal underwater electronics?

Waterproof grades with ‌IP68 ratings‌ protect marine sensors and subsea connectors ‌

2025-04-10

Which potting compound is best for LED modules?

Optically clear silicones maintain light transmission while resisting yellowing ‌

2025-04-10

‌Do potting compounds emit toxic fumes?

Low-VOC, non-flammable silicones and polyurethanes ensure workplace safety ‌

2025-04-10

Are halogen-free potting compounds available?

Yes, eco-friendly formulations meet ‌RoHS‌ and ‌REACH‌ standards for consumer electronics

2025-04-10

How to avoid air bubbles during potting?

Degas high-viscosity compounds under vacuum or use low-pressure dispensing systems

2025-04-10

‌What accelerates potting compound curing time?

Thermal curing at ‌60–80°C‌ reduces epoxy setting to

2025-04-10

How do potting compounds perform in UV-exposed environments?

UV-stable silicones and acrylic-modified epoxies prevent yellowing and degradation outdoors ‌

2025-04-10

Are there potting compounds resistant to fuels and oils?

Fluorosilicone and hydrocarbon-resistant polyurethane protect automotive sensors and fuel systems

2025-04-10

Do potting compounds shield against electromagnetic interference (EMI)?

Conductive fillers like carbon or metal particles enhance EMI shielding in specialized formulations ‌

2025-04-10

Why choose potting compounds with high dielectric strength?

Dielectric ratings ‌>20 kV/mm‌ (e.g., epoxy) prevent arcing in high-voltage transformers and power systems ‌

2025-04-10

What is the maximum operating temperature for epoxy potting compounds?

Standard epoxy resists up to ‌120–150°C‌; high-temperature grades tolerate ‌180°C‌ ‌

2025-04-10

Can potting compounds withstand thermal cycling?

Silicone-based compounds excel in environments with rapid temperature fluctuations due to low thermal expansion ‌

2025-04-10

How to improve heat dissipation with potting compounds?

Use ‌thermally conductive potting compounds‌ filled with ceramic or silica additives for efficient heat transfer

2025-04-10

‌What are semi-flexible potting compounds?

These hybrid formulations balance flexibility and rigidity, maintaining electrical insulation across wide temperature ranges ‌

2025-04-10

Are polyurethane potting compounds suitable for vibration resistance?

Yes, polyurethane’s elastomeric properties absorb mechanical stress, ideal for automotive and industrial electronics

2025-04-10

What is the difference between epoxy and silicone potting compounds?

Epoxy potting compounds offer high rigidity and adhesion strength, while silicone variants provide flexibility and thermal stability up to ‌200°C‌ ‌

2025-04-10

What factors affect potting compound cost?

Material type, thermal/electrical properties, and certification requirements influence pricing.

2025-04-10

Are custom-formulated potting compounds available?

Yes, manufacturers offer tailored solutions for ‌UV resistance, color matching‌, or unique viscosity needs.

2025-04-10

How to test potting compound adhesion strength?

ASTM D4541 or ISO 4624 standards measure bonding performance under stress.

2025-04-10

‌What are filled vs. unfilled potting compounds?

Filled compounds include additives like silica for ‌thermal management‌; unfilled prioritize electrical insulation.

2025-04-10

‌Can cured potting compounds be removed for repairs?

Silicone compounds are reworkable; epoxy requires mechanical grinding or solvents like ‌DMF for potting compound removal‌.

2025-04-10

How to prevent air bubbles in potting compounds?

Use vacuum degassing or slow-pour techniques to eliminate trapped air in ‌high-viscosity potting compounds‌.

2025-04-10

‌Do potting compounds emit harmful fumes during curing?

Low-VOC and ‌non-toxic potting compounds‌ minimize fumes, ensuring safe use in confined spaces.

2025-04-10

Are potting compounds RoHS and REACH compliant?

Many formulations meet ‌RoHS, REACH‌, and ‌UL 94 V-0 flammability standards‌ for global markets.

2025-04-10

‌Do potting compounds resist chemicals like oils and solvents?

Specialty ‌chemical-resistant potting compounds‌ protect against fuels, acids, and industrial solvents.

2025-04-10

Are potting compounds compatible with plastic housings?

Yes, but verify ‌adhesion strength‌ and ‌thermal expansion coefficients‌ to avoid cracking or delamination.

2025-04-10

How to choose between epoxy vs. silicone potting compounds?

Epoxy suits rigid, high-strength needs; silicone is better for ‌flexible, high-temperature potting applications‌.

2025-04-10

What is the dielectric strength of potting compounds?

Epoxy compounds offer ‌>20 kV/mm dielectric strength‌, critical for high-voltage applications.

2025-04-10

‌How does thermal conductivity affect potting compound performance?

‌Thermally conductive potting compounds‌ dissipate heat in power electronics, while standard compounds prioritize insulation.

2025-04-10

What is the curing time for epoxy potting compounds?

Curing times vary from 24 hours at room temperature to

2025-04-10

Are potting compounds suitable for underwater applications?

Yes, ‌waterproof potting compounds‌ with high ‌chemical resistance‌ protect marine electronics and sensors.

2025-04-10

Can potting compounds be used in high-temperature environments?

Yes, ‌silicone potting compounds‌ withstand temperatures up to ‌200°C‌, ideal for automotive and industrial applications.

2025-04-10

What industries use potting compounds?

Key industries include ‌electronics, automotive, aerospace, LED lighting‌, and renewable energy systems like ‌solar panels‌.

2025-04-10

What is the difference between potting and encapsulation?

Potting fully submerges components, while encapsulation coats surfaces. Potting compounds provide superior environmental protection.

2025-04-10

What are the main types of potting compounds?

The three primary types are ‌epoxy potting compounds‌ (high strength), ‌silicone potting compounds‌ (flexibility), and ‌polyurethane potting compounds‌ (impact resistance).

2025-04-10

What is potting compound?

Potting compound is a protective material used to encapsulate electronic components, offering insulation, moisture resistance, and mechanical stability. Common types include ‌epoxy, silicone, and polyurethane potting compounds‌.

2025-04-10

Does the color of potting compound affect the performance?

Color is usually an additive, which does not affect insulation or heat conduction, but it is necessary to avoid color change caused by light.

2025-04-10

Can potting compound be used for outdoor equipment?

Silicone is resistant to ultraviolet rays and temperature difference, and is the first choice for outdoor use.

2025-04-10

How to evaluate the quality of potting compound?

Test thermal conductivity, insulation strength (such as withstand voltage of 10000V), aging test and environmental protection certification.

2025-04-10

What factors affect the cost of potting compound?

Material type (most expensive in silicone), density, process complexity and bulk purchase preference.

2025-04-10

The necessity of vacuum encapsulation?

Polyurethane is easy to produce bubbles and needs vacuum environment; Epoxy resin and silicone can be operated manually.

2025-04-10

How to improve the adhesion of potting compound?

Choose epoxy resin or add coupling agent, or carry out surface treatment on the substrate.

2025-04-10

What is the difference between condensation silicone and addition silicone?

Condensation curing releases small molecules with poor adhesion; Addition molding has no by-products and low shrinkage.

2025-04-10

Is the potting compound toxic?

Non-toxic after curing, avoid touching the skin when it is not cured, and wash it with clear water if it is touched by mistake.

2025-04-10

How to store potting glue safely?

Sealed from light, the temperature is 15℃~25℃, to avoid moisture absorption or stratification, and it needs to be stirred before use.

2025-04-10

Influence of potting compound on high frequency circuit?

It is necessary to select low dielectric constant materials to reduce signal loss.

2025-04-10

What are the application advantages of potting compound in LED field?

Waterproof, heat dissipation and good light transmittance, and prolong the service life of lamps.

2025-04-10

Which industries is potting compound suitable for?

Electronics, automobiles, new energy, aerospace, medical devices, etc.

2025-04-10

What is the environmental protection standard of potting compound?

It must meet the halogen-free requirements such as RoHS and REACH, and some industries must pass UL certification.

2025-04-10

What is the thermal conductivity of potting compound?

Silicone has the best thermal conductivity and is often used in devices with high heat dissipation requirements.

2025-04-10

What is the temperature resistance range of potting compound?

Silicone:-60℃ ~ 250℃; Epoxy resin:-40℃ ~ 150℃; Polyurethane: -60℃~100℃

2025-04-10

How to repair the cured potting compound?

Silicone gel can be cut, taken out and refilled, and epoxy resin needs to be destructively removed.

2025-04-10

Why is the electronic potting glue "poisoned" and not solidified?

Contact with sulfur-and phosphorus-containing compounds or mixed with other glues requires isolation of pollutants.

2025-04-10

How to deal with pinholes on the surface after curing?

Optimize defoaming process, extend curing time or perform vacuum defoaming pretreatment.

2025-04-10

How to adjust the curing time of potting compound is too long?

Raise the ambient temperature to above 25℃, or choose quick-curing products.

2025-04-10

Causes and solutions of cracking after curing?

In case of mismatch of thermal expansion coefficient or external impact, it is necessary to select matching materials and avoid vibration during curing.

2025-04-10

What if the potting compound doesn't cure?

Check the accuracy of proportioning, whether the mixing is uniform, or raise the ambient temperature (especially in winter)

2025-04-10

How to avoid bubbles after curing?

Preheating devices, vacuum defoaming, lowering curing temperature or prolonging defoaming time.

2025-04-10

What are the correct operation steps of potting compound?

Cleaning the base surface → mixing the two components in proportion → fully stirring → pouring → curing (pay attention to temperature and time).

2025-04-10

What are the outstanding characteristics of polyurethane potting compound?

Excellent low temperature resistance (still flexible at -40℃), but poor temperature resistance (≤100℃).

2025-04-10

Which scenes is epoxy resin potting compound suitable for?

Suitable for indoor devices with high hardness and strong adhesion, but sensitive to temperature and difficult to repair.

2025-04-10

What are the advantages and disadvantages of silicone potting compound?

Advantages: high and low temperature resistance, aging resistance and easy repair; Disadvantages: weak adhesion and high price.

2025-04-10

How to choose the suitable potting compound type?

The temperature range (such as silicone's resistance to -60℃~250℃), hardness (high hardness of epoxy resin and good elasticity of silicone), repair demand and cost should be considered.

2025-04-10

What is the core function of potting compound?

Protect electronic components from impact, moisture and dust, improve insulation and assist heat dissipation.

2025-04-10

What kinds of potting glue are there?

Mainly divided into epoxy resin, silicone and polyurethane sealant, which are suitable for different temperatures, hardness and environmental requirements.

2025-04-10

What is potting compound?

Potting compound is a kind of liquid polymer material, which is used to fill the inside of electronic devices. After curing, it forms an insulating protective layer, which plays a role in waterproof, dustproof, heat conduction and earthquake resistance.

2025-04-10

What are the advantages of craft liquid silicone for mold filling?

Why is liquid mold silicone called liquid silicone? As the name suggests, it is a fluid material like a liquid. Compared with other materials, this is its most popular feature. Because the patterns on the surface of handicrafts are all strangely shaped, with textures of different depths, the ...

2025-04-02

What can be used to dilute liquid silicone

1. Silicone oil: Silicone oil is a commonly used liquid silicone diluent. It can lubricate and disperse in silicone, and can also reduce the viscosity and fluidity of silicone. 2. Ethanol: Ethanol is a commonly used solvent that can be used to dilute liquid silicone rubber. When using ethanol to ...

2025-04-02

Does climate change have an impact on the curing of industrial grade liquid silicone?

The temperature changes greatly throughout the year, with the four seasons changing from spring, summer, autumn and winter. Temperature is very sensitive to the curing time of industrial-grade liquid silicone. So, what impact does temperature change have on the curing time of liquid silicone?Cold ...

2025-04-02

How to test whether liquid silicone is vulcanized

Liquid silicone is a common rubber material that needs to be vulcanized during the production process to improve its physical properties and chemical stability. There are several methods to test whether liquid silicone is vulcanized: 1. Visual inspection: After vulcanization, the silicone surface ...

2025-04-02

What should I do if liquid silicone mold sticks when pouring it

When we use liquid silicone for production, various situations will arise. Among them, I believe many customers have encountered the problem of mold sticking. This situation is actually easy to solve.The sticky mold is generally very troublesome and difficult to pull out. If it is a very deep metal ...

2025-04-02

Why do liquid silicone products need to be molded first

Nowadays, liquid silicone products are used more and more widely. Silicone products can be seen everywhere in life. As a molding material, liquid silicone is fed into the silicone injection molding machine through a special mixing system, and is injected by the injection molding machine at a certain ...

2025-04-02

Advantages of liquid silicone products

Liquid silicone has excellent heat resistance, cold resistance, dielectric properties, ozone resistance and weather resistance. The outstanding property of silicone is its wide temperature range, allowing long-term use from -60°C to +250°C. However, silicone has poor mechanical properties such as ...

2025-04-02

Does the condensation type 10:1 potting compound cause abnormal power outage performance?

After curing, small molecules are generated in the condensation-type potting adhesive, which can affect the electrical performance of the product; Mainly manifested in:A. After solidification, there is an induced voltage between the shell and the positive and negative poles of the power supply. The ...

2025-03-26

Why does the two-component addition molding 1:1 potting adhesive cure very slowly in winter?

The curing speed of glue is closely related to the ambient temperature. In winter, when the temperature is low, the curing speed of glue is slow, which can be solved by heating.

2025-03-26

Does the volume of two-component potting adhesive expand after 1:1 curing

The phenomenon of incomplete curing or inability to cure when added silicone gel comes into contact with ionic compounds containing N, P, S organic compounds, Sn, Pb, Hg, As, and other elements, as well as alkynes and multi-vinyl compounds, is called "poisoning". The solder joints and residual rosin ...

2025-03-26

Is the addition potting adhesive

The phenomenon of incomplete curing or inability to cure when added silicone gel comes into contact with ionic compounds containing N, P, S organic compounds, Sn, Pb, Hg, As, and other elements, as well as alkynes and multi-vinyl compounds, is called "poisoning". The solder joints and residual rosin ...

2025-03-26

Why is it necessary to mix the silicone raw material of the mold evenly with the curing agent?

Mold silicone raw materials and curing agents should be stirred evenly, otherwise there may be situations where the surface is dry but the inside is not dry, or uneven curing, which can cause the mold to be scrapped. Efforts should be made to avoid such situations. If the size of this product is ...

2025-03-26

What are the reasons for poor curing of silicone molds?

What are the reasons for poor curing of silicone molds?There are two types of liquid silicone, one is industrial grade condensation mold silicone, and the other is additive grade food grade liquid silicone. The curing principles of these two types of silicone are different, so the reasons for ...

2025-03-26

What is the appropriate hardness and strength for mold silicone?

The hardness of mold silicone refers to the ability of silicone rubber material to resist being pressed into the surface by hard materials, that is, the hardness of silicone rubber. The hardness range of silicone rubber from 10 to 80 is Shore hardness, which allows designers to freely choose the ...

2025-03-26

Reasons and treatment methods for bubbles after silicone curing

When not familiar with using silicone sealant, or when handling liquid silicone for the first time, bubbles may sometimes appear. What are the reasons for this and how should we deal with it? Below, Hongtu will explain to you. 1, the air bubbles introduced during the mixing or gluing process have ...

2025-03-26

Application of Silicone Mold Opening in DIY Field

The application of silicone mold opening in the DIY field is gradually becoming a trend, and its unique performance and wide range of applications have attracted the attention of many DIY enthusiasts. The following will provide a detailed explanation of the characteristics of silicone molds, mold ...

2025-03-26

How to solve the problem of liquid silicone being too hard after solidification

Many first-time users of liquid silicone often purchase silicone that is not suitable for their products due to uncertainty about the specific hardness required. The hardness of liquid silicone has an interval value, which can be adjusted according to the needs. The softness and hardness of silicone ...

2025-03-26

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