10:1 Mix Ratio Transparent Waterproof Condensation Cure RTV-2 Silicone Potting Compound for Electronic Protection

10:1 Transparent Waterproof Condensation Cure RTV-2 Silicone Potting Compound for Aluminium PCB LED Protection

HN-8808A/B is a two-component transparent condensation-cure (tin) RTV-2 silicone potting compound, also known as RTV-2 liquid silicone rubber. Mixed at a 10:1 ratio by weight, Components A and B cure at room temperature into a high-performance transparent / water-clear elastomer that allows visual inspection of potted components. The cured material offers good adhesion (especially to aluminium substrates), no corrosion, small chemical shrinkage, no exotherm during cure, and excellent electrical insulation. Its waterproof and moisture-proof properties protect electronic assemblies from humidity across a wide −50 °C to 200 °C range, making it an ideal clear insulation potting material for PCBs, LED power supplies, waterproof power supplies and automotive electronic modules.

Key Features

• Transparent / Water-Clear Cure — The transparent cured elastomer allows visual inspection of potted components, conductive traces and LEDs after encapsulation.
• Waterproof & Moisture-Proof — Water resistant and waterproofing compound with humidity protection and damp proof sealing for PCBs and electronic assemblies in humid environments.
• Good Adhesion to Substrates — Adhesive strength and strong substrate adhesion, especially to aluminium substrates, without primer and with no corrosion to components.
• Excellent Electrical Insulation — Electrical insulating performance with dielectric strength ≥14 kV/mm and dielectric constant ≤3.0 for reliable insulation and voltage resistance.
• 10:1 Two Component RTV-2 — Simple 10:1 (A:B) mixing by weight of a tin-catalysed condensation-cure RTV-2 liquid silicone rubber; easy operation and room-temperature cure.
• Wide Temperature Range −50 °C to 200 °C — Heat resistant silicone encapsulant with good thermal stability and long-term aging resistance.
• Low Shrinkage & No Exotherm — Small chemical shrinkage and no exotherm during cure protect heat-sensitive components and dimensional accuracy.
• Room-Temperature Curing — Cures at room temperature (full cure 8–24 h); gentle post-cure heating (not exceeding 60 °C) may be used only after initial cure to accelerate.
• Soft, Stress-Relieving Elastomer — Elongation at break ≤100%; a soft elastomer that cushions components against impact resistance, mechanical protection and vibration.
• Anti-ageing & Weather Resistant — UV stable and anti-yellowing performance for long-term outdoor and ageing resistance.
• Non-corrosive & Environmentally Friendly — Non-corrosive to sealed components, non-dangerous general chemical and RoHS compliant.
• Low Viscosity & Easy Potting — 2200–2600 mPa·s mixed viscosity pours and self-levels easily for fine fill and deep fill potting.

Technical Specifications (HN-8808A/B)

Mixing & Application Instructions

1. Pre-mix: Stir Component A thoroughly before use to ensure any settled filler is uniformly dispersed; shake or stir Component B (curing agent) well.
2. Weighing: Accurately weigh Components A and B in a 10:1 ratio by mass using a precision scale; keep A and B stored separately in a clean, dry area.
3. Mixing: Mix A and B thoroughly until uniform in colour; scrape container walls and bottom. When mixing by hand, do not prepare too large a batch at once — curing is faster in summer and slower in winter.
4. Degassing: Place the mixed compound in a vacuum cabinet to remove entrapped air. Do not completely seal the potted device or heat above 100 °C before the curing mass is fully released.
5. Potting: Pour the degassed compound into the clean, dry device to complete potting; ensure complete coverage of traces and components.
6. Curing: Allow to cure at room temperature; complete curing takes 8–24 h. After initial cure, gentle heating (not exceeding 60 °C) may be used to accelerate. If complete sealing is required, seal after 3 days (summer) or 7 days (winter).

Application Notes

CRITICAL: the 10:1 mixed compound cannot be heated to accelerate curing immediately after mixing — only after initial cure may gentle heating (≤60 °C) be applied. Small molecules are produced during condensation curing, so ensure adequate ventilation and do not seal prematurely. Use the mixed compound at once and never return unused mixed material to the original containers; reseal Components A and B immediately after opening to avoid moisture contamination.

Typical Applications

Transparent waterproof condensation-cure RTV-2 silicone potting and encapsulation, including:

• Circuit boards (PCBs) and LED power supplies, LED modules, lighting potting and LED encapsulation
• Waterproof power supplies and automotive electronic modules
• Electrical appliances, light sources, lamps and their accessories
• Aluminium substrates requiring good adhesion
• General electronic encapsulation requiring transparent, waterproof and insulating protection
• Sensors, connectors and control boards and other moisture-sensitive electronic assemblies

Packaging, Storage & Supply

• Packaging: Component A 20 kg / 10 kg (iron or plastic drum) + Component B 2 kg / 1 kg (plastic bottle); kit 22 kg/set (20+2) or 11 kg/set (10+1).
• Storage: Store in original, tightly sealed containers below 25 °C in a cool, dry, well-ventilated area; protect from direct sunlight, moisture, heat and extreme temperatures.
• Shelf life: 6 months from date of manufacture when stored unopened and properly sealed (best used within 3 months).
• Supply: Direct China manufacturer (Shenzhen, Guangdong) offering OEM/ODM customization, free samples and bulk wholesale supply at factory-direct pricing.

About This Supplier

Shenzhen Hanast New Material Co., Ltd. is a premier high-tech enterprise and leading source manufacturer specializing in the R&D, manufacturing, and global supply of industrial silicone materials. As a strategic branch of the renowned Shenzhen Kanglibang Technology Co., Ltd., Hanast integrates over a decade of chemical adhesive expertise with a cutting-edge 40,000-square-meter modern production base (including our newly expanding Jiangmen facility) to deliver high-capacity, reliable material solutions worldwide.

We serve as a vital tier-one supplier and OEM/ODM partner for global factories, procurement managers, and engineering teams across diverse sectors, including electric vehicles (EV), battery energy storage systems (BESS), solar inverters, LED lighting, and industrial automation.

FAQ

Q1: What is HN-8808A/B and what are its key features?

A: HN-8808A/B is a two-component transparent condensation-cure (tin) RTV-2 silicone potting compound with a 10:1 mix ratio. It cures at room temperature into a water-clear elastomer with good adhesion, no corrosion, small shrinkage and no exotherm.

Q2: What is the mix ratio and curing schedule?

A: Mix Component A and Component B at a 10:1 ratio by weight. It cures at room temperature; full cure takes 8–24 h. After initial cure, gentle heating not exceeding 60 °C may be used to accelerate curing.

Q3: What are the electrical insulation and temperature performance?

A: It provides dielectric strength ≥ 14 kV/mm, dielectric constant ≤ 3.0, elongation at break ≤ 100%, and operates from −50 °C to 200 °C with waterproof and moisture-proof performance.

Q4: Why choose a transparent potting compound?

A: The transparent, water-clear cure allows visual inspection of potted components, traces and LEDs, while giving waterproof, insulating protection — ideal for PCBs, LED power supplies and aluminium substrates.

Q5: What are the MOQ, packaging and delivery time?

A: Minimum order quantity is 1 kg, supplied as 22 kg/set (A 20 kg + B 2 kg) or 11 kg/set (A 10 kg + B 1 kg). Free samples ship in 3–5 working days and bulk orders in 7–15 days; OEM/ODM available.