
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 91740 DynaMesh 8" 180 Grit Hook & Loop Discs, 50 per box
Dynabrade 91242 8" Dia. x 220 Grit A/O Non-Vacuum PSA DynaCut Disc, 25/Box
Dynabrade 14010 Dynafile Abrasive Belt Tool Versatility Kit
3M 20868, PSA Cloth Disc 348D, P120 X-weight, 8 in x NH, Die 800L, 7010326519
3M 01745, Imperial Hookit Disc 740I, 8 in, 36E, 7010364829, 25 discs per carton
3M 12787, Wetordry Cloth Disc 281W, 8 in x NH, P600, 7010363748
3M 00525, Green Corps Hookit Disc, 8 in, 36, 7000120340, 25 discs per carton
Dynabrade 13509 Dynastraight Finishing Tool, Rear Exhaust, 6,000 RPM, 5/8" (16 mm) or 1" (25 mm) Dia. Arbor
3M 36414, Blue Net Disc, 180, 8 in, 7100253872, 25 Discs/Carton
ACS Diamond Cloth Belt, CX1250 3" X 30" 75U
Dynabrade 78103 2" Dia. x 36 Grit Premium Ceramic Non-Vacuum DynaCut Locking-Type Disc, 25/pack
3M 00521, Green Corps Hookit Disc, 8 in, 80, 7000120338, 25 discs per carton
3M 31647, Cubitron II Net Disc, 320+, 8 in, 7100248703, 25 Discs/Carton
3M 13372, Scotch-Brite Star, 3 in A CRS LS, 7000120967
3M 97419, Aluminum Foil Tape 3380, Silver, 48 mm x 45 m, 3.25 mil, 7000049613
Standard Abrasives 727334, Buff and Blend Cross Buff HS, A/O Coarse, 1 in x 3/8 in x 2 Ply x 8-32, 7000047211
Dynabrade 79447 6" x 9" DynaBrite General Purpose Maroon Hand Pad, 60/Box
3M 01853, Imperial Hookit Dust-Free Disc 740I, 8 in, 36E, 7010307752, 25 discs per carton
Standard Abrasives 827620, Buff and Blend HP Power Pad, 6 in x 9 in, A VFN, 7010310293, 50 ea/Case
3M 29825, Sanding Screen, 60 Grit, 20 in x NH, 7100160253
3M 16612, Accuspray Atomizing Head, Orange, 1.4 mm, 7100017731 (4 Nozzles/Kit)
Dynabrade 95843 Dynabrade Air Lube 10W/NR, 1 Gallon
Dynabrade 53533 Cone or Plug Grinder (Triple Extension)
Dynabrade 95842 Dynabrade Air Lube 10W/NR, 1 Pint
Dynabrade 40320 Dynafile II Abrasive Belt Tool 
