3M™ Heavy Duty aluminium Foil Tape 438 Silver, 183 micron aluminium foil tape with pressure sensitive acrylic adhesive.
3M™ Heavy Duty aluminium Foil Tape 438, dead-soft aluminium foil backing, excellent heat and light reflection to protect against high temperatures and U.V. degradation. The foil also serves as an excellent barrier against moisture. Acrylic adhesive supplies superior temperature, U.V. and solvent resistance. It provides excellent age life and is ideal for harsh, long-term outdoor environments. Thickest aluminium foil tape. Meets F.A.R 25.853(a) and meets UL 723 Class L.