A Tape with Versatility
Originally developed for heating, ventilation and air conditioning (HVAC) applications, duct tape is used today in a variety of maintenance, repair and construction settings. 3M™ Heavy Duty Duct Tape 3939 is an excellent choice for general indoor application in MRO and construction. The tape was tested for flame spread using test method UL723, ASTM E84 and can be used at temperatures as high as 200°F for up to 30 minutes. The sturdy cloth-reinforced tape can be torn from the roll by hand and sticks instantly, providing a wide range of convenient solutions. This tape has a classic silver-colored backing.
Recommended Applications
- Patching
- Bundling
- Reinforcing
- Tabbing
- Taping / splicing insulation
- Capping pipe
- Securing conduit ends
- Marking
- Labeling
- Temporary repair
- Hanging poly (polyethylene drapes)
- Protecting against light sandblast overspray
Built to Stick
3M’s family of rugged cloth and duct tapes adheres to most surfaces for applications ranging from bundling to moisture proofing, sealing to splicing, reinforcing to hanging poly drapes. Available in a variety of colors and strengths, they’re known best for their hand tearability, high tensile strength and conformability.

Dynabrade 64404 36" W x 60" L (914 mm W x 1,524 mm L) Metal Capture Downdraft Table, 230 V (AC), Side Exhaust
Dynabrade 93541 1-1/2" Dia. x 8-32 Female Center Thread, 80 Grit, A/O, 3-Ply, J-DynaCut Eyelet Star, 50/pack
3M 92210, Scotch Shipping Packaging Tape 3950S-6, 1.88 in x 38.2 yd (48 mm x 35 m), 7100242420
Dynabrade 11476 Dynabelter Abrasive Belt Tool, Heavy-Duty
Dynabrade 14010 Dynafile Abrasive Belt Tool Versatility Kit
Dynabrade 78718 7/8" x 2"-A11 Dynacut A/O Mounted Point, 5/pack
Dynabrade 11486 Dynabelter Accu-Grinder Abrasive Belt Tool, Heavy-Duty
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
Standard Abrasives 850307, Multi-Finish Wheel, 6 in x 3 in x 1 in 2S CRS, 7010301235
Dynabrade 14000 Dynafile Abrasive Belt Tool
Dynabrade 14360 Pneumatic Pipe Belt Finisher
Dynabrade 64350 26" W x 36" L (660 mm W x 914 mm L) Metal Capture Downdraft Station, 230 V (AC)
Dynabrade 11399 Type 27 Wheel Mounting Adapter Kit
Dynabrade 51301 .5 hp Straight-Line Die Grinder
Dynabrade 40320 Dynafile II Abrasive Belt Tool
Dynabrade 78710 5/16" x 5/8"-B53 Dynacut A/O Mounted Point, 5/pack
ACS CX1250 Diamond Belt, 1/2" X 24" 60u 
