resin r-831-2 thermal class f (155c) 2 comp. epoxy ul approved e227128 introduction r-831-2 epoxy continuous immersion resin is made from modified epoxy resin, hardener, thinner and presented in two-component form. component a/b is 1:1 by weight. it has gained ul certification (e227128) and ul insulation system certification (e242776). features good manufacturability, fast curing, high insulation strength, rust proof applications/use minitype motors and apparatus coils of grade b and f. continuous immersion and fast drying immersion insulation process. be used for hermetic motor coil.