250C High Temperature Halogen-Free Silicone Potting Compound UL 94 V-0 Flame Retardant Silicone Encapsulant for EV Battery Charging Station

HN-8806A/B is a two-component addition-cure (platinum) silicone potting compound supplied in a 1:1 mix ratio by weight. It cures at room temperature or in 12 minutes at 80 C into a flexible grey elastomer that protects motor stators, EV battery modules, charging station power boards and PV inverter assemblies. The cured material combines 0.76 W/mK thermal conductivity, 25-30 kV/mm dielectric strength and a -50 C to 250 C service range. The formulation is halogen-free, REACH and RoHS compliant, UL 94 V-0 flame retardant and releases no heat or by-products during cure, so sealed components are not corroded or stressed.

• Halogen-free and REACH compliant formulation for EU and North American OEM supply chains.
• UL 94 V-0 flame retardancy with RoHS compliance for electronic assemblies.
• Wide service temperature -50 C to 250 C, suitable for under-hood and power electronics heat loads.
• Thermal conductivity 0.76 W/mK to move heat from windings and power devices into the housing.
• Dielectric strength 25-30 kV/mm and volume resistivity 1.0 x 10^16 Ohm.cm for reliable insulation.
• Deep-section curing in thick battery modules and large stator castings without voids or exotherm.
• Extremely low cure shrinkage and low stress on delicate windings, sensors and solder joints.
• No heat and no by-products released during cure; non-corrosive to sealed components.
• 1:1 mix ratio by weight with 18-24 min pot life for manual or meter-mix dispensing.
• ISO 9001 certified factory with TDS, MSDS and batch traceability for every shipment.

HN-8806A/B is specified for insulation, moisture proofing, thermal management and mechanical protection in the following assemblies:

• Motor stator and coil encapsulation - winding insulation, vibration damping and heat transfer in servo motors, BLDC motors and automotive traction motors.
• EV battery systems - battery pack, battery module and BMS board potting for thermal runaway protection and vibration resistance.
• EV charging infrastructure - charging pile, charging station, AC/DC charging module and connector board encapsulation.
• Photovoltaic and energy storage - PV inverter, solar micro-inverter, hybrid inverter and ESS battery cabinet power boards.
• Power electronics - IGBT power module, MOSFET module, DC-DC converter, transformer, reactor and power supply units.
• Industrial and automotive electronics - sensor, controller, ECU, PCB and circuit board protection, under-hood electronics and rail traction control units.
• Lighting and appliances - LED driver, LED power supply, household appliance control board and smart device modules.
• Other equipment - submersible pump motor, wind power converter, 5G communication equipment and medical device electronics.

Values are measured at 25 C, 50-60% RH after the recommended cure schedule and are for reference only.

1. Pre-mix: stir Component A and Component B separately before use because fillers may settle during storage; reseal containers immediately.
2. Weighing: weigh A and B at exactly 1:1 by weight on a precision electronic scale.
3. Mixing: mix in one direction and scrape the container walls and bottom to avoid local incomplete cure.
4. Degassing (optional): vacuum degas for void-sensitive battery and IGBT modules.
5. Potting: pour within the 18-24 min pot life and ensure complete coverage of windings, terminals and components.
6. Curing: cure 2-3 h at 25 C or 12 min at 80 C; do not move or stress the part during cure.

• ISO 9001 certified factory in Shenzhen, Guangdong, China with 50 tons per month capacity.
• OEM / ODM private label - custom color, drum labels and kit sizes for brand owners and distributors.
• Free sample and 1 kg trial kit for heat ageing, thermal cycling and process validation before bulk ordering.
• Technical support - application engineering guidance on mix ratio, pot life, degassing, cure schedule and cure inhibition troubleshooting.
• Documentation - TDS, MSDS, RoHS and REACH declarations and batch COA issued with every shipment.
• Packaging - Component A 25 kg plastic barrel plus Component B 25 kg plastic barrel, 50 kg per set, export carton on pallet.
• Shelf life - 6 months from date of manufacture in original sealed containers at 25 C, protected from sunlight and moisture.
• Transportation - classified as non-dangerous goods (general chemicals).

Q1: Is HN-8806A/B halogen-free and REACH compliant?

A: Yes. The formulation is halogen-free, RoHS compliant and REACH compliant, and it is UL 94 V-0 flame retardant, so it meets the documentation requirements of EU and North American OEM projects.

Q2: Can it be used for EV battery and charging station potting?

A: Yes. With 0.76 W/mK thermal conductivity, 25-30 kV/mm dielectric strength and a -50 C to 250 C range, it is used for EV battery modules, BMS boards, charging pile power modules and charging station connectors.

Q3: What is the pot life and cure schedule on a production line?

A: Pot life is 18-24 min at 25 C. Cure 2-3 h at room temperature, or 12 min at 80 C for heat-accelerated lines; deep sections cure without exotherm or by-products.

Q4: Does the cured compound stress delicate components?

A: No. Shore A 45 +/- 5 hardness, extremely low cure shrinkage and low stress protect windings, sensors and solder joints during thermal cycling and vibration.

Q5: What are the MOQ, packaging, lead time and sample policy?

A: Standard packaging is 25 kg per component barrel, 50 kg per A+B set. MOQ is one 50 kg set, a 1 kg trial kit and free sample are available, stock ships in 3-7 working days and bulk orders in 10-15 days. OEM private label is available from our ISO 9001 factory.

Shenzhen Hanast New Materials Co., Ltd. manufactures liquid silicone materials at a production base in Guangdong, China, supplying addition-cure and condensation-cure silicone for electronic potting, thermal management and mould making. Every lot ships with TDS and MSDS documentation and complies with RoHS, REACH and UL 94 V-0 requirements.