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 11476 Dynabelter Abrasive Belt Tool, Heavy-Duty
Dynabrade 11084 Contact Wheel Ass'y, 3/4" Dia. x 1/2" W x 3/8" I.D., Crown Face, 70 Duro Rubber
Dynabrade 95843 Dynabrade Air Lube 10W/NR, 1 Gallon
Dynabrade 51301 .5 hp Straight-Line Die Grinder
Dynabrade 95842 Dynabrade Air Lube 10W/NR, 1 Pint
Dynabrade 53533 Cone or Plug Grinder (Triple Extension)
Dynabrade 95821 Dynabrade Air Lube 10W/NR, 4oz Bottle
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
Dynabrade 40320 Dynafile II Abrasive Belt Tool
Dynabrade 10690 Filter/Regulator/Lubricator, FRL40, 1/2" NPTAssy.
Dynabrade 14360 Pneumatic Pipe Belt Finisher
Dynabrade 15101 Tension Arm (for Mini Dynafile II)
Dynabrade 95675 1/4" Male Plug with 1/4" NPT Male Thread
Dynabrade 96101 Dynabrade Air Lube 10W/NR 24 Per Box
3M 65005, Scotch-Brite Deburr and Finish Pro Unitized Wheel, DP-UW, 6C Medium+, 3 in x 1 in x 1/4 in, 7100053422
3M 29836, Sanding Screen, 60 Grit, 18 in x NH, 7100160820
Dynabrade 11486 Dynabelter Accu-Grinder Abrasive Belt Tool, Heavy-Duty
3M 71878, Flexible Diamond Hand File 6210J, Yellow 18, N40, NO 1, 7000082156, 10 per case
3M 28120, Hookit Clean Sanding Disc 900DZ, 5 in 60 J-weight, Die 500LG, 7010326613
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
3M 71358, 641WY 1/4" X 24", 600 Mesh Diamond Cloth Belt, 7010534894 
