HANAST HN-5508 A/B 5:1 Black Epoxy Potting Compound for Transformer, Power Supply and Sensor Encapsulation HN-5508 A/B is a two-component, room-temperature or heat-curable epoxy potting compound developed for the electronics and electrical industry. Mixed at a 5:1 ratio by weight, it flows with low viscosity and long pot life, penetrates narrow gaps, and cures bubble-free into a smooth, glossy, high-hardness (Shore D 85-95) black encapsulant. It combines high dielectric