Flexible Silicone Electronic Potting Gel Two Component 1:1 Waterproof for Solar Inverter BESS Power Encapsulation
Product Overview
HN-8806 is a flexible two-component 1:1 addition cure silicone electronic potting gel specifically developed for solar inverter PCB protection and BESS (Battery Energy Storage System) power module encapsulation. With its low-viscosity deep-section curing capability, IP67-equivalent waterproof sealing, and 0.76 W/m·K thermal conductivity, it provides comprehensive environmental protection for renewable energy power electronics. The flexible Shore A 50±5 elastomer after curing absorbs thermal expansion stress, preventing PCB component damage in outdoor solar installations. RoHS compliant, UL 94 V-0 flame retardant, and available in factory-direct bulk supply.
Key Features for Solar Inverter & BESS Applications
- ✅ IP67 Waterproof Protection — Superior moisture and water ingress resistance for outdoor solar inverter installations exposed to rain, humidity, and condensation
- ✅ Deep Section Curing — Low-viscosity formulation cures uniformly in thick sections without exotherm or by-products, ideal for densely packed BESS power modules
- ✅ Flexible Elastomer After Cure (Shore A 50±5) — Absorbs thermal expansion and contraction stress, preventing solder joint fatigue in solar inverter PCBs
- ✅ 0.76 W/m·K Thermal Conductivity — Efficient heat transfer from power semiconductors in solar MPPT controllers and BESS DC-DC converters
- ✅ Low Shrinkage & Non-Corrosive — Zero corrosion to sensitive SMD components, copper traces, and aluminum substrates during and after curing
- ✅ UL 94 V-0 Flame Retardant — Critical safety compliance for energy storage systems installed in residential and commercial buildings
- ✅ 18-25 kV/mm Dielectric Strength — Robust high-voltage insulation for 1000V/1500V solar string inverter architectures
- ✅ 1:1 Simple Mix Ratio — Compatible with both manual potting and automated meter-mix dispensing for high-volume solar inverter production lines
Technical Specifications
| Parameter | Part A | Part B |
|---|---|---|
| Appearance (Before Curing) | Grey Fluid | White Fluid |
| Viscosity at 25°C | 4500~5000 mPa·s | 4500~5000 mPa·s |
| Density at 25°C | 1.50±0.05 g/cm³ | 1.50±0.05 g/cm³ |
| Mixing Ratio (A:B) | 1:1 (Weight & Volume) | |
| Operating Time | 0.3-0.4 hr at 25°C | |
| Curing Condition | 4-12 hr at 25°C / 0.2 hr at 80°C | |
| Property (After Curing) | Value | Test Standard |
|---|---|---|
| Appearance | Grey Flexible Elastomer | Visual |
| Hardness | Shore A 50±5 | GB/T 531.1-2008 |
| Thermal Conductivity | ≥0.76 W/m·K | GB/T 10297-1998 |
| Volume Resistivity | ≥1.0*10¹⁶ Ω·cm | GB/T 1692-92 |
| Dielectric Strength | 18-25 kV/mm | GB/T 1693-2007 |
| Moisture Absorption (24h, 25°C) | 0.01-0.02% | GB/T 8810-2005 |
| Expansivity | 210 µm/(m·°C) | GB/T 20673-2006 |
| Temperature Resistance | -50 to +250°C | Measured |
| Flame Retardancy | UL 94 V-0 (3mm sample) | UL 94 |
Target Applications
Encapsulates MPPT controllers, DC-AC inverter boards, and power semiconductors in outdoor string and central inverters. IP67 waterproofing ensures 25-year service life matching solar panel warranties.
Protects battery management modules, DC-DC converters, and power distribution units in residential, commercial, and utility-scale energy storage systems.
Suitable for IGBT power modules, charging pile controllers, UPS systems, and industrial automation power supplies requiring flexible stress-absorbing encapsulation.
Why Silicone Gel Over Epoxy for Solar & BESS
Flexible · Stress absorbing · Repairable · Deep section cure · Wide temp range
Rigid · Stress prone · Non-repairable · Exotherm risk · Narrow temp range
Silicone gel's flexibility absorbs thermal cycling stress in outdoor solar applications, while its repairability allows PCB rework — a critical advantage epoxy cannot offer. The deep-section cure capability enables single-pour encapsulation of tall BESS power modules without layered potting.
Packaging & Ordering
Standard kit packaging: 10kg/Set (A:5kg + B:5kg), 20kg/Set (A:10kg + B:10kg), 50kg/Set (A:25kg + B:25kg). Export-grade moisture-proof packaging. Minimum order: 10kg. Factory-direct wholesale from 40,000 sqm production base with 50,000 kg monthly capacity. Store in cool dry place at room temperature. Shelf life: 6 months. Non-toxic, non-dangerous goods. MSDS and TDS provided with every shipment. Contact us for volume pricing, custom formulations, and free sample evaluation.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.