
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.

Dynabrade 79447 6" x 9" DynaBrite General Purpose Maroon Hand Pad, 60/Box
3M 53914, Performance Plus Duct Tape 8979N Nuclear Red, 48 mm x 54.8 m 12.1 mil, 7000049014, 24/ case
3M 86745, Diamond Disc, 2" Roloc, 674W, 120 Mesh, TR, 7100022116, Box of 10
Air Turbine Tools 310RDM - 1/4" Router Hand Tool Series, 30,000RPM, 33432
3M 62812, Adhesive Sealant 740 UV, White, 290 mL Cartridge, 7100116448, 12 per case
3M 33780, 641WY 1/4" X 24", 400 Mesh Diamond Cloth Belt, 7010534915
3M 76783, Cubitron II Hookit Cloth Disc 784F, 120+ XF-weight, 5 in x NH, Die 500X, 7100222757
ACS CX1250 Diamond Belt, 1/2" X 24" 60u
Dynabrade 13509 Dynastraight Finishing Tool, Rear Exhaust, 6,000 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
Dynabrade 78128 3" Dia. Coarse NWN VT DynaBrite Locking-Type Disc, 25/pack
Dynabrade 78290 2" Dia. x 2S Fine, Type R Unitized Locking-Type Disc, 25/pack
3M™ 07011, Supplied Air Respirator Hose W-9435-50/07011(AAD), 7000005373, 1 EA/Case
3M 22409, Roloc Disc 361F, P120 XF-weight, TR, 1-1/2 in, Die R150S, 7000045103
3M™ 72016, Remote Alarm & Strobe 529-05-20, Audible, 7000131708, 1 EA/Case
3M™ 72787, Calibration Kit 529-04-48, Large, 7000052154, 1 EA/Case
3M 26018, PPS Series 2.0 Adapter, Type S11, 3/8 Male, 18 Thread NPS, 7100135942
Dynabrade 15420 Dynafile III Abrasive Belt Tool
Dynabrade 51700 .1 hp Straight-Line Pencil Grinder, Rear Exhaust, 60,000 RPM, 1/8" Collet
Dynabrade 55500 .1hp Pencil Grinder, Twin Turbine, 100,000 RPM, Nickel-Plated Aluminum Housing, 1/8" Collet
3M 05048, Cloth Belt 384F, 80+ XF-weight, 1 in x 12 in, Fabri-lok, Full-flex, 7100141432, 200 per case
3M 29847, Sanding Screen, 60 grit 16 x NH, 7100160824
3M™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
3M™ 53797, Flexible Diamond Belt 6451J, 1/2" Dia x 18" L, M125 Micron, Type G, Pattern B2, 7010509272
Dynabrade 51703 .1 hp Straight-Line Pencil Grinder, Rear Exhaust, 50,000 RPM, 1/8" Collet
3M 09099, Scotch-Brite Paint and Rust Stripper Large Area 9099NA, 7010375230
3M 29829, Sanding Screen, 80 Grit, 19 in x NH, 7100160252
3M™ 07010, Supplied Air Respirator Hose W-9435-25/07010(AAD), 25 ft, 3/8 in ID, Industrial Interchange Fittings, High Pressure, 7000005374, 1 EA/Case
3M 27551, EMI Copper Foil Shielding Tape 1181, 1/2 in x 18 yd (12.70 mm x 16.5m), 7000132182 
