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A superior quality US made duct tape for demanding applications. Duct and HVAC work (what your contractor uses to fix his mom's duct work) hanging poly sheeting in remediation sites, maintenance applications in demanding OEM facilities, seaming and securing underlayment materials, sealing polyethylene disposal bags and more.

How superior? 80 ounces/inch adhesion to steel test offers a far superior holding power in hanging applications. And 11 mils thick is no lightweight either. To benchmark, standard HVAC grades are 9 mils.

Strong tensile numbers at 26 lbs/inch. This provides an excellent balance of tensile strength and hand tearability. 21% elongation gives you ease of use when applying. Tap it down and start wrapping. You can pull to really set the adhesive without it snapping.

Operating temperature range of 40F up to 200F. No, that doesn't mean you can use it on Mars. It means you can use it in ducts right out of the furnace with plenty of margin for higher temperature spikes.

Low VOC Content, less than 1 g/L. Nashua 398 can contribute towards satisfying EQ Credit 4.1 under LEED.