ELANTAS PDG CONATHANE EN-2521 Polyurethane Resin System is a two component, filled system that is used for potting and encapsulation of transformers, circuitry, coils, and modules. It cures at room to elevated temperatures and offers good electrical properties, low exotherm, low shrinkage, and low stresses. It is resistant to water, thermal shock, aliphatic hydrocarbons, mild acids and bases. 5 gal Kit.