Robnor PX700K-1 Twin Pack Potting Compound – Robnor PX700K-1/BK/250, Robnor PX700K-1 twin-pack potting compound is a general-purpose, black, flame-retardant potting and encapsulating compound suitable for high voltage transformers, circuit boards, high voltage capacitors, anti-tamper security, etc. Robnor PX700K-1/BK/250 Potting Compound Twin Pack 250g