One of the best electrical tapes available from a name you can trust - 3M.  UL listed and CSA certified. Primary electrical insulation for all wire and cable splices rated up to 600 volts and for fixture and wire splices up to 1000 volts. Applies at - 18º C/0º F and has an operating range up to 105º C/220º F. Flame retardant, and resists UV rays, abrasion, moisture, alkalis, acids, hot and cold weather. Meets requirements of ASTM D-3005, Type I, UL 510, HHI-595C and CSA 22.2.