Heat Cure low-stress, extremely tough, epoxy casting system casting system for large bushings, insulators, power and instrument transformers. Higher heat deflection temperature when compared to CLR 1331 / CLH 5515 family. Machine dispense friendly with excellent thermal stability and thermal cycling performance. A heat cure, low stress, extremely tough, epoxy casting compound. It was specifically designed for casting large bushings, insulators, instrument and power transformers. The cured material exhibits excellent thermal stability and thermal cycling characteristics. This product meets UL94-HB flammability requirements.