Thermally Conductive Potting Compound 2.0W/m·K UL94 V-0 Waterproof Silicone for EV Onboard Charger DC-DC Converter Waterproof Potting Compound HN-8820 AB for EV Onboard Charger & DC-DC Converter Protection HN-8820 AB is a waterproof and anti-aging two-component silicone potting compound with 2.0 W/m·K thermal conductivity and UL 94 V-0 flame retardant certification . Purpose-engineered for EV onboard charger (OBC), DC-DC converter, and high-power electronic module encapsulati