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 90635 3" W x 7-3/8" L 220 Grit A/O DynaCut Belt, 10/pack
Dynabrade 14341 - 2" (51 mm) W x 6" (152 mm) L Platen Pad
Dynabrade 78505 1-1/2" x 1/2", 1/4-20 Female Center Thread, 60 Grit, 8-Ply, Dynacut A/O Square Pad, 100/pack
Dynabrade 92261 2-1/4" W x 9-3/4" L 80 Grit A/Z DynaCut Belt, 10/pack
Dynabrade 79184 1/4" W x 12" L 120 Grit DynaCut Premium Ceramic Belt, 50/pack
Dynabrade 54039 3/8"-24 Female 5/16"-24 Female, 1" Length
Dynabrade 90755 3" Dia. x 2" W, Medium, Non-Woven DynaBrite Band, 10/pack
Dynabrade 48327 .4 hp Straight-Line Die Grinder, Rear Exhaust, 30,000 RPM, 1/4" Collet
Dynabrade 54359 .7 hp Right Angle Die Grinder, Rear Exhaust, 18,000 RPM, 1/4" Collet
Dynabrade X31V - 3" Dia. Cen-Vacuum Dynorbital® Mini Extreme Random Orbital Sander
Dynabrade 47201 .4 hp Straight-Line Die Grinder, Rear Exhaust, 3,200 RPM, 1/4" Collet
Dynabrade 94790 1/2" W x 72" L 120 Grit A/Z DynaCut Belt, 10/pack
Dynabrade 50020 Threaded Collet, M8 x 1.0 Female Thread (Two Piece)
Dynabrade 11475 Dynabelter Abrasive Belt Tool, Standard Duty
Dynabrade 93333 Carbide Burr, 3/8" Dia., SC-3 D/C Burr, Cylinder-Radiused End, 3/4" Flute L, 1/4" Shank
Dynabrade 90028 3" Dia. Polishing Pad, Synthetic Wool
Dynabrade 92018 1" Dia. x 1-1/2" W, 60 Grit, Z/A DynaCut Band, 10/pck
Dynabrade 51706 .1 hp Straight-Line Pencil Grinder, Rear Exhaust, 35,000 RPM, 1/8" Collet
Dynabrade 51347 3" (51 mm) Dia. Locking-Type Disc Pad, Medium Density, 3/8"-24 Thread
Dynabrade 78364 8" Dia. x 1" W x 3" Center Hole, 9S Fine, S/C DynaBrite Deburring Convolute Wheel, 2/box
Dynabrade 51956 Felt Seal
Dynabrade 55587 .4hp Mini Right Angle Drill with Adjustable Angle Head, 5,000 RPM, Rear Exhaust, 9/32"-40 Thread
3M 01875, Charge-Collection Solar Tape 3011, 2 mm x 1200 m, 7010312686 
