3M Scotchfil Electrical Insulation Putty is a 125 mil thick, non corrosive, mastic adhesive that offers optimized adherence. It comes in a tape form that is used to insulate irregular surfaces like fittings and valves. This self fusing, electrical grade tape can be stretched or wrapped and helps to insulate connections up to 600V. It withstands a wide temperature range of 32 to 176 °F (0 to 80 °C). RoHS Compliant.