HN-5508AB UL94 V-0 Clear Flame Retardant 5:1 Epoxy Potting Compound HN-5508AB is a two-component, halogen-free, clear flame retardant epoxy potting compound supplied at a 5:1 mix ratio by weight. It is engineered for power adapters, ballasts and surge protection devices where a UL94 V-0 rating must be combined with visible inspection of the potted assembly. The cured resin is clear, glossy and bubble free, with Shore D 80 hardness, 20-22 kV/mm dielectric strength, water