3M™ High Temperature Aluminum Foil Tape 433L, Silver, 5 in x 60 yd, 3.6 mil, 2 Roll/Case. For heat shielding applications such as wrapping over and along thermal insulation, use 3M™ High Temperature Aluminum Foil Tape 433L. This dead soft aluminum foil tape is coated with a clear silicone pressure sensitive adhesive that bonds well to a variety of surfaces and excels in high temperature applications, where other adhesive tapes may fail.