Patco 585 Dissimilar Metal Tape This product consists of a highly conformable, durable polyethylene substrate combined with an aggressive permanent adhesive system. Applications Used as a permanent barrier between dissimilar metals, this tape prevents electrolytic corrosion. Used in Aerospace, truck assembly and machine construction. Features & Benefits --Good insulator. --Excellent conformability. Good U.V. and moisture resistance. --Allows for permanent seal. Long life protection indoors or outdoors. --Prevents build up of corrosion.