Abstract: A multiple layer of plastic films is laminated in tape form in combination with a layer of aluminum foil so as to enclose the aluminum in a protective layer of plastic, the remaining layers being chosen to provide dielectric and moisture protection for the cable, and incorporating a greater width of plastic combinations than aluminum, such extra width being optionally folded over upon the section containing the aluminum, to provide contiguous faces having thermoplastic properties which will be sealed by the heat of extrusion of the cable jacket during the manufacturing process.