3M™ Aluminum Foil Tape 425 is a dead-soft aluminum foil tape with a pressure-sensitive acrylic adhesive that is ideal for harsh, long-term outdoor environments. It has a dead-soft aluminum foil backing, excellent heat and light reflection to help protect against high temperatures and UV degradation. The foil also serves as an excellent barrier against moisture, dust, flame and certain chemicals as used in aircraft paint stripping masking. Acrylic adhesive supplies great temperature, UV and solvent resistance. 3M™ Aluminum Foil Tape 425 meets requirements of F.A.R. 25.853(a) and U.L. 746C (File E 122798) and 723, Class "L" low flammability rating (File R 7311).