Waterproof RTV Silicone Potting Gel with High Thermal Conductivity (≥0.76 W/m*K) and UL 94 V-0 Flame Retardancy for Electronics Encapsulation

Waterproof RTV Silicone Potting Gel High Thermal Conductivity for LED Driver Power Module Encapsulation

HN-8806A/B is a waterproof RTV silicone potting gel and two-component high thermal conductivity potting compound that cures at room temperature or by heating into a high-performance flexible elastomer. Mixed at a 1:1 equal-part A/B component ratio by weight, it provides high thermal conductivity (≥0.76 W/m·K) for heat dissipation, heat transfer and thermal management, combined with high electrical insulation, waterproofing and a wide −50 °C to 250 °C operating range. The low-viscosity liquid flows into fine fill and deep fill gaps and cures with extremely low shrinkage, while remaining water resistant and moisture proof with humidity protection, damp proof sealing and IP67/IP68 grade protection concept for harsh, humid environments. It is UV stable and anti-yellowing, cushions components against impact, vibration and drop damage, and offers good substrate adhesion without primer — making it an ideal potting gel for LED drivers, power modules, battery and inverter electronics.

Key Features

• Waterproof & Moisture Proof RTV Gel — Waterproofing compound with water resistant, humidity protection and damp proof sealing (IP67/IP68 protection concept) for harsh and humid electronics.
• High Thermal Conductivity — Thermal conductive potting ≥0.76 W/m·K acts as an effective thermal interface for heat dissipation, heat transfer and thermal management of LED drivers, power modules and batteries.
• Two Component 1:1 Equal-Part System — Simple AB component mixing at a 1:1 ratio by weight for consistent results, suitable for manual potting and automatic dispensing.
• High Electrical Insulation — Insulation resistance, voltage resistance and electrical insulating performance with volume resistivity 1.0 × 10¹⁶ Ω·cm and dielectric strength 25–30 kV/mm.
• Wide Temperature Range −50 °C to 250 °C — Heat resistant silicone encapsulant with good thermal stability and long-term aging resistance.
• UL 94 V-0 Flame Retardant — Flame retardant compound with self-extinguishing, non-flammable and fire retardant silicone performance for safety-critical parts.
• Low Viscosity, Fine & Deep Fill — 2000–3000 mPa·s self-leveling liquid penetrates fine fill gaps and supports deep fill and deep-section curing with extremely low shrinkage.
• Flexible, Shockproof & Vibration Resistant — Soft Shore A 45±5 elastomer cushions components against impact resistance, mechanical protection, vibration dampening and drop protection.
• Fast / Room Temperature Curing — Quick cure / rapid curing with a short curing time of only 12 min at 80 °C, or preliminary 2–3 h at room temperature.
• UV Stable & Anti-Yellowing — UV stable, anti-UV, outdoor UV and anti-yellowing weather resistance for long-term outdoor reliability.
• Good Substrate Adhesion — Adhesive strength and strong substrate adhesion to PCB, metal and plastic housings without primer, with no corrosion to sealed components.
• RoHS Compliant — No heat or by-products released during cure; non-hazardous general chemical and environmentally friendly.

Technical Specifications (HN-8806A/B)

Mixing & Application Instructions

1. Pre-mix: Stir Components A and B thoroughly before use as fillers may settle during storage; seal containers tightly after use.
2. Weighing: Accurately weigh Components A and B at a 1:1 ratio by weight using a precision electronic scale.
3. Mixing: Mix A and B thoroughly in the same direction to avoid introducing excessive bubbles; scrape the container walls and bottom for full dispersion.
4. Degassing (optional): For void-sensitive applications, vacuum degas to remove air for void-free and deep fill potting.
5. Pouring / Potting: Pour the mixed gel into the clean, dry device within the open time / working time (pot life 18–24 min at 25 °C), ensuring complete coverage of fine gaps and windings.
6. Curing: Cure at room temperature (25 °C, 2–3 h preliminary) or heat accelerated (80 °C, 12 min) for a short curing time / rapid curing. Do not move or stress the part during cure.

Typical Applications

Waterproof high thermal conductivity RTV silicone potting gel for encapsulation and protection of electronics, including:

• LED drivers, LED power supply, LED modules, lighting potting, LED encapsulant and outdoor LED encapsulation
• Power modules and power supplies, transformers, inductors, IGBT and semiconductor devices requiring heat dissipation
• EV battery, EV potting, battery pack, BMS potting, battery management systems, on-board charger (OBC) and inverter potting for electric vehicles
• Photovoltaic, PV junction box, junction box potting, PV potting, solar module, solar inverter and renewable energy
• 5G base station, 5G potting, RF module, antenna potting, telecom and communication equipment
• Automotive electronics, automotive ECU, motor controllers and ignition coils
• Electronic components, PCBs, circuit boards, sensors, controllers, connectors, relays and junction boxes
• Underwater and aquarium equipment and other moisture-sensitive devices

Packaging, Storage & Supply

• Packaging: Component A 25 kg plastic barrel + Component B 25 kg plastic barrel, 50 kg/set kit.
• Storage: Store in original, tightly sealed containers in a cool, dry, well-ventilated area at 25 °C; protect from direct sunlight, moisture and extreme temperatures.
• Shelf life: 6 months from date of manufacture when stored as recommended.
• Supply: Direct China manufacturer (Shenzhen, Guangdong) offering OEM/ODM customization of hardness, viscosity, pot life, cure speed and colour, with 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: Is this a waterproof RTV silicone potting gel?

A: Yes. HN-8806A/B is a waterproof RTV silicone potting gel and two-component high thermal conductivity potting compound. It is water resistant and moisture proof with humidity protection and damp proof sealing (IP67/IP68 protection concept) for harsh, humid and outdoor electronics.

Q2: What is the mix ratio and curing schedule?

A: Mix Component A and Component B at a 1:1 ratio by weight. Pot life / operating time is 18–24 min at 25 °C; it cures at room temperature in 2–3 h (preliminary), or in only 12 min at 80 °C for fast, heat-accelerated curing.

Q3: What thermal and electrical performance does it offer?

A: It offers high thermal conductivity ≥ 0.76 W/m·K for heat dissipation, heat transfer and thermal management, with volume resistivity 1.0 × 10¹⁶ Ω·cm, dielectric strength 25–30 kV/mm and UL 94 V-0 flame retardancy.

Q4: What is the operating temperature range?

A: HN-8806A/B operates from −50 °C to 250 °C with good thermal stability, is UV stable and anti-yellowing for outdoor reliability.

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

A: Minimum order quantity is 1 kg, supplied as 25 kg (A) + 25 kg (B) 50 kg/set kits. Free samples ship in 3–5 working days and bulk orders in 7–15 days, with bulk silicone encapsulant supply available across Asia and worldwide.