3M™ 431 Aluminum Foil Tape is a 2-mil nominal dead soft aluminum foil with transparent acrylic adhesive for many permanent sealing, holding, splicing or masking applications requiring the protection offered by a foil backing.
Flame resistant. Meets U.L. 723, Class “L” low flammability rating (File R 7311).
Meets requirements of F.A.R. 25.853(a).
Foil backing provides an excellent reflective surface for both heat and light.
Good aging performance both indoors and outdoors.
Low moisture vapor transmission rate offers excellent sealing and patching performance.
Best results attained when applied to clean dry surface above 32°F (0°C).
Seal and patch tears in truck trailers, as well as other outdoor equipment.
Reflect heat away from sensitive areas.
Thermal heat conduction.
General purpose holding, patching, sealing applications – indoors or out.
Splicing of thin gauge foils.
Good maskant in electroplating of aluminum because it will not contaminate the bath.