We developed 3M™ Lead Foil Tape 421 as an electrically and thermally conductive tape. This highly conformable tape resists flame, moisture, weather, UV degradation, chemicals and radiation. Mated with an easy-release film liner, our malleable tape can be shaped into complex or detailed patterns or die-cut into specific shapes to meet assembly and manufacturing process needs. - 3M lead foil tape 421 are backed with a rubber adhesive, offering excellent conformability in a variety of application conditions, indoors and out. Performs over a wide variety of temperature conditions and is heat reflective.