
Ideal for sealing rigid, fiberglass ductboard systems and flexible, non-metallic air ducts
Our 3M™ Foil Tape 3340 is constructed using a 2.0 mil aluminum foil backing with a strong, pressure sensitive acrylic adhesive for long-term adhesion, along with an easy releasing poly coated kraft paper liner to protect the adhesive and keep the tape ready for use. The highly engineered aggressive acrylic adhesive performs in both cold and hot temperature conditions.
Recommended Applications
- Heating Ventilation Air Conditioning (HVAC)
- Duct closure
- Vapor seal on reinforced fiberglass duct board
- For use with rigid fiber glass duct board
- For use with flexible air ducts and air connectors
Superb Temperature Resistance
When sealing ducts and other surfaces for heating, ventilation and air conditioning systems, it’s essential to have a strong, long-lasting foil tape that can stand up well to hot and cold temperatures. The 3M™ Foil Tape 3340 has the combination of a foil backing and acrylic adhesive that gives our tape a superb operational temperature range of -40°F (-40°C) to 300°F (149°C). The benefits don’t end there; the foil backing also serves as an excellent barrier against moisture, dust and many chemicals — making it strong, durable and long-lasting. The very low moisture vapor transmission rate makes the tape a good sealant and the acrylic adhesive supplies superior temperature and UV resistance to give you a strong, lasting and reliable bond. 3M™ Foil Tape 3340 is used in a variety of applications across a number of industries, including: transportation, specialty vehicle, metalworking, construction, automotive, military and government, general industrial, MRO, electronics and aerospace.

3M 21543, Scotch-Brite Roloc Clean and Strip XT Pro Extra Cut Disc, TR, 2 in x NH, A XCS, 7100179815, 60/box
3M 76783, Cubitron II Hookit Cloth Disc 784F, 120+ XF-weight, 5 in x NH, Die 500X, 7100222757
Dynabrade 11684 Dynabelter Contact Arm Assembly 4" DIA X 5/8" W., 40 Duro Serrated
3M 16615, Accuspray Atomizing Head, Blue, 1.2 mm, 7100086837 (4 Nozzle/Kit)
Dynabrade 11477 Dynabelter Abrasive Belt Tool, Heavy-Duty
3M™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
3M™ 72122, Portable Compressed Air Filter and Regulator Panel 256-02-01, 100 cfm, 8 outlets, with Carbon Monoxide Monitor, 7000052147, 1 EA/Case
Dynabrade 14000 Dynafile Abrasive Belt Tool
3M 20910, PSA Cloth Disc 348D, 60 X-weight, 2 in x NH, Die 200P, 7000118872
3M 33780, 641WY 1/4" X 24", 400 Mesh Diamond Cloth Belt, 7010534915
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
Standard Abrasives 725017, Buff and Blend Cross Buff GP, A/O Fine, 3/4 in x 3/8 in x 2 Ply x 8-32, 7010330367
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Air Turbine Tools 310RDM - 1/4" Router Hand Tool Series, 40,000RPM, 33442
3M™ 17323, Versaflo™ Respiratory Helmet Assembly M-407, with Premium Visor and Flame Resistant Shroud, 7000002395, 1 EA/Case
3M 77197, Scotch-Brite™ Roloc™ Deburr and Finish PRO Unitized Wheel,TR, 3 in x 1/8 in x NH, 8C CRS+, 7100109130, 40/box
3M 80510, Roloc Disc 777F, P120 YF-weight, TR, 1 in, Die R100N, 7000045622
3M 22396, Roloc Disc 361F, 36 YF-weight, TR, 1-1/2 in, Die R150S, 7000045091
3M 76632, Roloc Disc 777F, 50 YF-weight, TR, 3 in, Die R300V, 7000045628
Standard Abrasives 725008, Buff and Blend Cross Buff HP, A/O Very Fine, 1 in x 3/8 in x 2 Ply x 8-32, 7000046829
3M 55065, Cubitron II Cloth Belt 984F, 36+ YF-weight, 3/4 in x 20-1/2 in, Fabri-lok, Single-flex, 7000148169, 200 per case
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3M 29832, Sanding Screen, 150 Grit, 18 in x NH, 7100160831
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3M 22408, Roloc Disc 361F, P100 YF-weight, TR, 1-1/2 in, Die R150S, 7000045101
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3M 33439, Cubitron II File Belt, 33439, 60+, 10 mm x 330 mm (3/8 in x 13 in), 7100033194, 10 belts per carton, 5 cartons per case 
