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3M™ Foil Tape 3340

3M Product Number  3340     
3M(TM) Foil Tape 3340 UL181A-P Roll Image
3M(TM) Foil Tape 3340 UL181A-P Roll Image
3M™ Foil Tape 3340 Silver, aluminum foil backing and a pressure sensitive acrylic adhesive and paper liner.ÿ UL181A-P /B-FX Listed.
  • Acrylic adhesive, 2.0 mil backing thickness
  • UL 181 A-P and UL 181 B-FX printed backing for HVAC systems
  • 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
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3M™ Foil Tape 3340 is ideal for sealing rigid fiberglass duct boards and flexible(non-metallic) air duct and connector systems. UL 181 AP and UL 181 B-FX Listed.


Adhesion to Steel oz/in (N/100 mm)30 (33)
Adhesive TypeAcrylic
ApplicationsSealing HVAC & Duct Work
Backing MaterialAluminum Foil
Backing Thickness2 mil
Backing Thickness (metric)0.05 mm
IndustriesTransportation, Specialty Vehicle, Metalworking, Construction, Automotive, Military & Government, General Industrial, MRO, Electronics, Aerospace
Length50 Linear Yard, 49.97 Linear Yard
Length (Metric)45.7 m, 45.72 m
Liner TypePaper
Meets SpecificationsUL 181A-P, UL 181B-FX
Operating Temperature Range (Celsius)-34 to 121 Degree Celsius
Operating Temperature Range (Fahrenheit)-30 to 250 Degree Fahrenheit
Product FormRoll
Tensile Strength lb/in (N/100 mm)20 (350)
Total Thickness4 mil
Width2.5 Inch, 2.83 Inch
Width (Metric)63.5 mm, 72 mm