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Grey duct tape roll on a spool, 1 7/8 inches wide

3M

3M Series 3979 Duct Tape, Grey, 1 7/8 in x 60 yd, 7.9 mil

SKU CH-AGKB-CY2TC

General-purpose duct tape with rubber adhesive on polyethylene-coated cloth, 60 yd long by 1 7/8 in wide, 7.9 mil thick, rated to 200 °F and 68 oz/in adhesion

  • Main materialHAWA
  • Overall length5.5
  • Strong hold with 68 oz/in adhesion to steel
  • Handles heat up to 200 °F for demanding tasks
  • 60 yd roll covers large projects efficiently
  • 9 mil thickness resists tears and abrasion
  • Polyethylene-coated cloth backing for durability

3M 3979 Series Duct Tape

3M Series 3979 is a general-purpose duct tape built for everyday repairs, bundling and sealing tasks. The polyethylene-coated cloth backing carries a rubber adhesive rated at 68 oz/in adhesion to steel. Supplied as a continuous roll measuring 1 7/8 in wide by 60 yd long, it suits contractors, maintenance crews and DIY users who need a reliable single-sided tape for indoor jobs.

Indoor Temperature Limit 200 °F

This tape is rated for a maximum performance temperature of 200 °F and is designated for indoor use only. It replaces cloth-backed utility tapes that lack a defined heat rating or that fail above lower temperatures. The jump is worth it when the application demands consistent adhesion up to the stated limit and a verified 7.9 mil thickness for predictable tear resistance.

General-Purpose Indoor Repair

The roll suits anyone needing a 47.6 mm wide, 54.8 m long tape for sealing ducts, patching sheet materials or bundling cables inside a building. Buyers who require outdoor weathering resistance, plenum-rated materials or a higher temperature ceiling should look at products specified for those conditions.

How it compares

Measured against everything we stock in Electrical Conduit & Fittings, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 70% of the 1,290 comparable items (median $28.99).

Specifications

Product
Brand name3m
Size & build
Main materialHAWA

Questions about this item

What surface width does the 1 7/8 in tape cover?

The roll is 1 7/8 in (47.6 mm) wide, so it covers that width in a single pass.

How do I apply the rubber adhesive without trapping air bubbles?

Press firmly along the full length as you unroll; the rubber adhesive bonds instantly to steel at 68 oz/in, so gaps weaken the hold.

When should I replace tape that has been near the 200 °F limit?

Replace it if the polyethylene-coated cloth backing darkens, stiffens or loses tack after prolonged exposure to 200 °F.

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