Low Stress Halogen-Free Silicone Potting Compound with 1:1 Mix Ratio for UPS Welding Machine Mining Explosion-Proof Units

HN-8806A/B is a two-component 1:1 addition-cure silicone potting compound for industrial equipment that runs hot, vibrates and is serviced in the field. The cured 45 +/- 5 Shore A elastomer keeps stress low on windings, busbars and solder joints, absorbs vibration and thermal shock, and insulates at 25-30 kV/mm with 1.0 x 10^16 Ohm.cm volume resistivity. It is halogen-free, UL 94 V-0 flame retardant and RoHS compliant, conducts 0.76 W/mK, cures at room temperature in 2-3 h or in 12 min at 80 C, and serves from -50 C to 250 C.

• Low stress on components - Shore A 45 +/- 5, extremely low cure shrinkage and 210 um/(m.C) CTE protect windings, busbars and solder joints.
• Vibration and thermal shock resistance - flexible elastomer absorbs transport shock, motor vibration and load cycling in heavy-duty equipment.
• Halogen-free, RoHS compliant, UL 94 V-0 - flame-retardant insulation for cabinets, battery rooms and confined industrial spaces.
• 25-30 kV/mm dielectric strength and 1.0 x 10^16 Ohm.cm volume resistivity for drives, busbars and power assemblies.
• 0.76 W/mK thermal conductivity - moves heat from windings and power devices into the housing or heatsink.
• Deep-section curing without exotherm or by-products - thick castings cure evenly and do not corrode copper, aluminium or plated terminals.
• -50 C to 250 C service range - stable in cold storage, outdoor cabinets, engine bays and high-temperature industrial zones.
• 1:1 mix ratio, 18-24 min pot life, 2000-3000 mPa.s - works with manual pouring, cartridges and dual-pump meter-mix lines.
• Room temperature or 80 C cure - 2-3 h at 25 C for field repair, 12 min at 80 C for volume production.
• ISO 9001 certified factory with TDS, MSDS, batch COA and REACH documentation for every shipment.

• UPS and data center power - UPS module, rectifier, static transfer switch, data center PDU and backup power cabinet.
• Welding and metal working - welding machine, inverter welder, plasma cutter, induction heater and welding transformer.
• Elevator and lifting - elevator control cabinet, door motor, traction machine terminal block and lift inverter.
• Port and heavy machinery - port crane, reach stacker, conveyor drive, mining equipment and explosion-proof enclosure.
• New energy industry - hydrogen fuel cell stack, battery swap station, charging pile, BESS rack, PV inverter and wind power converter.
• Drives and automation - servo drive, VFD frequency inverter, PLC cabinet, industrial robot controller and CNC power unit.
• Power electronics - IGBT power module, DC-DC converter, transformer, reactor, capacitor bank, contactor and fuse holder.
• Transport and marine - rail traction module, trackside electronics, marine battery system, offshore wind converter and subsea power unit.
• Other industrial equipment - smart meter, medical device power board, 5G base station rectifier, UAV power board and LED driver.

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; reseal containers immediately.
2. Weighing: weigh A and B at exactly 1:1 by weight with a precision scale.
3. Mixing: mix in one direction and scrape the container walls and bottom to avoid local uncured spots.
4. Degassing (optional): vacuum degas for void-free modules, busbars and thick castings.
5. Potting: pour within the 18-24 min pot life and ensure complete coverage of windings, terminals and clearances.
6. Curing: cure 2-3 h at 25 C or 12 min at 80 C; do not move or stress the assembly during cure.

• ISO 9001 certified factory in Shenzhen, Guangdong, China with 50 tons per month capacity.
• Technical support - application engineering on mix ratio, pot life, degassing, cure schedule, cure inhibition and field repair.
• OEM / ODM private label - custom color, drum labels and kit sizes for equipment makers and distributors.
• Free sample and 1 kg trial kit for dielectric, vibration and thermal cycling validation before bulk ordering.
• Documentation - TDS, MSDS, RoHS and REACH declarations and batch COA 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 sealed containers at 25 C, away from sunlight and moisture.
• Transportation - classified as non-dangerous goods (general chemicals).

Q1: Why choose a low stress silicone for industrial power equipment?

A: Shore A 45 +/- 5 hardness, extremely low cure shrinkage and 210 um/(m.C) CTE keep mechanical stress low on windings, busbars and solder joints, so vibration, thermal shock and load cycling do not crack insulation or solder fillets.

Q2: Is it suitable for UPS, welding machines and elevator controllers?

A: Yes. The compound insulates at 25-30 kV/mm, conducts 0.76 W/mK and serves -50 C to 250 C, which covers UPS modules, inverter welders, welding transformers, elevator control cabinets and lift inverters.

Q3: Can it be used in mining, port and marine environments?

A: Yes. The cured elastomer is flexible, non-corrosive and halogen-free with UL 94 V-0 flame retardancy, so it suits port crane drives, mining and explosion-proof enclosures, marine battery systems and offshore wind converters.

Q4: What about hydrogen fuel cells and battery swap stations?

A: The low stress and thermal shock resistance make it suitable for fuel cell stack frames, battery swap station power modules, BESS racks and charging equipment, with deep-section curing and no exotherm or by-products.

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, industrial power protection, thermal management and mould making. Every lot ships with TDS and MSDS documentation and complies with RoHS, REACH and UL 94 V-0 requirements.