With 130°C relative temperature index rating, 50-3150RFR Black Epoxy with Catalyst 30 will survive elevated temperatures for long periods of time, which offers benefits as electronics get smaller and hotter. Compound is UL 746B listed and formulated to meet stringent non-burning requirements of UL 94 V-0. Typical applications include encapsulating power supplies, transformers, coils, insulators, and sensors.