HANAST HN-5508 A/B Low Viscosity Thermally Conductive Black Epoxy Potting Compound for Power Module and Automated Dispensing Encapsulation HN-5508 A/B is a two-component, room-temperature or heat-curable epoxy potting compound engineered for the electronics and electrical industry. Mixed at a 5:1 ratio by weight, the low-viscosity system flows readily, delivers good fluidity and a long pot life, and penetrates deep into narrow gaps, fine windings and tight housings before