3M 431 439L Aluminum Foil Tape for heat shielding, heat reflecting, light enhancement, seaming and sealing
3M Aluminum Foil Tape 431 and 439L 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.
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