3M 425 Aluminum Foil Tape


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Product Details

3M™ Aluminum Foil Tape 425 combines a 3 mil nominal dead soft aluminum foil backing with a transparent acrylic adhesive.

Product Features

  • Temperature Rating: 300° F / 149° C
  • The very low moisture vapor transmission rate makes these tapes a good sealant
  • The acrylic adhesive, combined with the durable aluminum backing, offers ideal properties for long serviceable life in and outdoors
  • Good candidate as a maskant in electroplating of aluminum because it will not contaminate the bath
  • Aluminum backing provides excellent reflection of both heat and light


  • 2.8 Mil Foil Thickness
  • 1.8 Mil Adhesive Thickness
  • 4.6 Mil Total Thickness
  • Roll Length - 60 yards

Application Ideas

  • Aircraft paint stripping maskant
  • Moisture barrier in “white goods” appliances
  • General purpose heat reflector and heat dissipater
  • Mechanically hold wires and cooling coils in “white goods” appliances
  • Repair tears on truck trailers and aircraft
  • Splicing of thin gauge foils
  • General purpose holding, patching, sealing applications – indoors and out


  • Tensile Strength (lb/in) - 28
  • Elongation (%) - 6
  • Steel Adhesion (oz/in) - 47
  • Flame resistant. Meets U.L. 746C (File E 122798) and 723, Class “L” low flammability rating (File R 7311)
  • Can be certified to meet SAE-AMS-T-23397 and L-T-80C
  • Meets requirements of FAR 25.853(a)

IMPORTANT: These tapes are not intended for medical usage. Neither 3M™nor the Food and Drug Administration have evaluated or reviewed this tape for medical application. 3M™does not recommend or endorse the usage of the aluminum tape for medical application. User assumes all risk and liability whatsoever in connection with usage of product in a medical application.

Materials Specifications