R-381-m series potting resin are made from epoxy resin, hardener and filler presented in two-component form. Wherein, R-381-1 is heating type product. R-381-3 cures at room temperature. They all have excellent fire resistance property. They have gained UL certification (E229550) and UL insulation system certification (E242776). Their main features are good manufacturability and insulation property, low shrinkage, shining appearance of condensate and excellent crack resistance.They are applied for potting electronic components, motor and apparatus coils such as : small transformer, instrument transformer coils, capacitor, ignition coils of autocycle and auto etc.