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This is a single roll of aluminum foil tape, 77 mm wide and 32 m long, with a thin 0.06 mm foil backing and a pressure-sensitive adhesive. The foil resists heat up to about 120°C, is flame-retardant and waterproof, and reflects radiant heat, which is why it is used on HVAC duct seams, pipe insulation and reflective projects. It is a general-purpose hardware-store consumable rather than a branded product, so it competes on width, length and foil thickness against foil tapes from brands like Nashua and 3M. The 77 mm width covers duct seams in fewer passes than common 50 mm rolls, but the foil is thin and the adhesive is not a high-tack acrylic, so it is best for light sealing and reflection rather than permanent outdoor duct work.
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Lowest price we've seen: $15.59 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
This self-adhesive aluminum foil tape is made from aluminum foil and adhesive. It resists heat and flame and is waterproof. It is used for sealing HVAC air ducts, insulating hot or cold pipes, and light-reflective projects.
The tape sticks to any type of surface, as long as the surface is clean. The backing paper peels off easily from the edge.
