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3M™ Heavy Duty Aluminum Foil Tape 438 Silver, 38 mm x 400 m 7.2 mil, 2 rolls per case

3M ID  70006385531    UPC#  00021200426414    Part Number  438    3M Product Number  438     
3M(TM) Aluminum Foil Tape 4380 2 inch x 55 yd Roll Standing
3M(TM) Aluminum Foil Tape 4380 2 inch x 55 yd Roll Standing
3M™ Heavy Duty Aluminum Foil Tape 438 Silver, 7.2 mil (0.18 mm) aluminum foil tape with pressure sensitive acrylic adhesive.
  • Heavy duty aluminum foil tape, 5.0 mil thick foil backing
  • Heavy duty patch tape for aircraft and truck trailer skins, barrier for vinyl coated wires in appliance industry, U.L. 723, F.A.R. 25.853(a)
  • Resists flame, resists moisture, resists weather, resists UV degradation, chemical resistant tape, thermally conductive tape for heating and cooling efficiency, heat reflective tape, light reflective tape, conformable tape
  • Automotive, Aerospace, HVAC, Appliance, Military, Government, Defense, Marine, Metal Finishing, Electronics, Recreational Vehicle, Construction, General Industrial
  • Masking, sealing, seaming, shielding, chemical stripping, harness wrapping, joining, vibration damping, electroplating, plastic protection, chemical milling, heat shielding, heat reflecting, paint stripping
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3M™ Heavy Duty Aluminum Foil Tape 438, dead-soft aluminum 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 aluminum foil tape. Meets F.A.R 25.853(a) and meets UL 723 Class L.


Adhesion to Steel oz/in (N/100 mm)43 (47)
Adhesive TypeAcrylic
Backing MaterialAluminum Foil
Backing Thickness5 mil
Backing Thickness (metric)0.18 mm
Elongation10 Percent
IndustriesTransportation, Specialty Vehicle, Metalworking, Construction, Automotive, Military & Government, General Industrial, Appliance, Electronics, Aerospace
Length437.44 Linear Yard
Length (Metric)400 m
Meets SpecificationsF.A.R. 25.853(a), MIL-T-47014
Operating Temperature Range (Celsius)-54 to 149 Degree Celsius
Operating Temperature Range (Fahrenheit)-65 to 300 Degree Fahrenheit
Product FormRoll
Shelf Life24 Months
Tensile Strength lb/in (N/100 mm)59 (1033)
Total Thickness7.2 mil
Width1.49 Inch
Width (Metric)38 mm