22 kV/mm High Dielectric Epoxy Potting Compound HN-5508A/B – Capacitor, Transformer & Sensor Encapsulation Hanast HN-5508A/B is a high dielectric strength (22 kV/mm) epoxy potting compound purpose-engineered for electrical and electronic components requiring superior high voltage insulation. Formulated as a two-component black epoxy system, it delivers exceptional dielectric protection for capacitors, transformers, industrial sensors, and LED modules operating in high-voltage