Professional grade, 7 mil, all weather vinyl insulating tape used for electrical and mechanical protection in temperatures ranging from 0 to 220 deg F. UL listed and CSA approved, EV 77B black electrical tape is lead free, flame retardant, and is engineered with a polymeric backing construction, as well as a specialized method of bonding the adhesive to the vinyl backing, which allows the tape to be highly conformable and deliver a moisture-tight seal, even in extreme temperatures.