3M(TM) Scotch-Seal(TM) Mastic Tape Compound 2229, 1 in x 10 ft, Black,Moisture & Corrosion Resistant Tacky mastic adhesive provides excellent adherence over irregular surfaces Tape measures 1 in x 10 ft x 125 mil For insulating electrical connections rated up to 1000 volts if over wrapped with vinyl or rubber electrical tape. Also used for sealing high-voltage cable splice and termination accessories for 90 C continuous operating temperature. Easy release liner