Conathane EN-21 is an easy-to-use, UL 94 HB certified, two-component, low viscosity polyurethane resin system. This system was formulated specifically for the potting, casting, embedding and encapsulation of electronic circuits, components and power devices. Other outstanding properties of this system include low stress build-up on embedded components, reversion resistance and excellent moisture resistance. - Conathane EN-21 cures to yield an 80 Shore A elastomer with outstanding characteristics such as excellent electrical properties, low exotherm and low shrinkage. Low stress build-up on embedded components.