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 78724 3/8" x 3/4"-B52 Dynacut A/O Mounted Point, Vitrified, 5/pack
Dynabrade 91428 1/2" W x 12" L 60 Grit A/O DynaCut Belt, 50/pack
Dynabrade 01794 Rubber Drive Wheel
Dynabrade 10690 Filter/Regulator/Lubricator, FRL40, 1/2" NPTAssy.
Dynabrade 15420 Dynafile III Abrasive Belt Tool
Dynabrade 40610 Electric Dynafile II Abrasive Belt Tool
Dynabrade 82495 6" Dia. x 400 Grit A/O Vacuum PSA Filmbac DynaCut Disc, 100/Pack
Dynabrade 90368 3/4" W x 34" L 80 Grit A/O DynaCut Belt, 50/pack
Dynabrade 57113 Rotor/Vane Set
Dynabrade 93534 3" Mandrel for Sanding Stars, 3-48 Male Thread
Dynabrade 14000 Dynafile Abrasive Belt Tool
3M 15095, Scotch Heavy Duty Masking Tape 2020+-48TP6, 1.88 in x 60.1 yd (48mm x55m), 6 rolls/pack, 7100191056
Dynabrade 79004 1/8" W x 12" L 80 Grit A/Z DynaCut Belt, 50/pack
Dynabrade 14230 Rubber Drive Wheel
Dynabrade 82565 1/2" W x 18" L 120 Grit Ceramic DynaCut Belt, 50/pack
3M 87397, Silver Depressed Center Grinding Wheel, T27 Quick Change, 4.5 in x 1/4 in x 5/8-11 in, 7010362237, Case of 20 
