
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.

Standard Abrasives 708751, PSA A/O Disc, 12 in x NH, 60, 7010370081
3M™ 72010, Replacement Filter Kit 523-01-29, 7000056891, 1 EA/Case
Dynabrade 64350 26" W x 36" L (660 mm W x 914 mm L) Metal Capture Downdraft Station, 230 V (AC)
3M 77558, Cubitron II Hookit Cloth Disc 947A, 77558, 40+ to 120+, 6 in x NH, Die 600Z, 7100232737
3M 71358, 641WY 1/4" X 24", 600 Mesh Diamond Cloth Belt, 7010534894
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
NORTON 66623313931 - 3" Dia. Blaze Rapid Blend Quick-Change TS (TYPE II) Non-Woven Disc, 25 Each
3M 01326, PSA Cloth Disc 348D, P240 X-weight, 3 in x NH, Die 300V, 7000045069
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
Dynabrade 55501 .1hp Pencil Grinder, Twin Turbine, 100,000 RPM, Nickel-Plated Aluminum Housing, 3mm Collet
3M 29831, Sanding Screen, 180 Grit, 18 in x NH, 7100160238
Air Turbine Tools 310RDM - 1/4" Router Hand Tool Series, 40,000RPM, 33442
3M 77559, Cubitron II Hookit Cloth Disc 784F, 77559, 36+ to 120+, 5 in x NH, Die 500X, 7100232738
ACS CX1250 Diamond Belts, 1/2" X 24" 200u
Norton 66261009191 - 2" Blank Coarse Grade Rapid Prep Non-Woven Surface Preparation Disc, 25 Each
3M 47192, Polyurethane Adhesive Sealant 550FC Fast Cure, White, 600 mL Sausage Pack, 7100198000, 12/Case
Standard Abrasives 704491, Cartridge Roll Mandrel, 3/16 in x 3/4 in x 1/4 in x 1 in x 2-3/4 in CM-15, 7000121768
3M 21543, Scotch-Brite Roloc Clean and Strip XT Pro Extra Cut Disc, TR, 2 in x NH, A XCS, 7100179815, 60/box
3M 11412, Roloc Disc 361F, 36 YF-weight, TR, 1 in, Die R100N, 7000045092
Standard Abrasives 715081, A/O Straight Cartridge Roll, 5/8 in x 2 in x 3/16 in 60, 7100102991
ACS Diamond Cloth Belt, CX1250 1/4" X 24" 75U
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
3M 94734, Cubitron ll Cloth Belt 947A, 80+ X-weight, 3-1/2 in x 15-1/2 in, Fabri-lok, Single-flex, 7100093313, 50 per case
3M 97419, Aluminum Foil Tape 3380, Silver, 48 mm x 45 m, 3.25 mil, 7000049613 
