Shurtape SF 686 UL ShurMASTIC Butyl Foil Indoor/Outdoor HVAC Tape, 181B-FX Listed/Printed, 3" x 33.3 Yards, Silver, 1 Roll (111163)

Correct width delivered. Roll lasts forever! Easy to work with

Heavy and wide. Just what I wanted. I am using the mastic / foil tape to air seal the ducts on my furnace. Slicking it down with a plastic spreader makes a big difference in how tightly it seals.

Very sticky HVAC tape that sealed flexable duct to rigid duct. HVAC company wanted to charge me 5x more than this cost.

This is the real duct tape with the black butyl layer that molds around little cracks, dents or screws. It may be pricey, but I used this stuff 10 years ago and that's the only stuff that still held when I redid my ducts this year, all the other silver tape or paste was dried out, broken, cracked you name it.....it may be a bit more expensive, but it lasts, it works and you only need one strip around every seal you want to make. Easy to handle as well....so totally worth it...

Quality of the tape made it easy to apply to my a/c ductwork. Unlike some of the other mastic tapes that I used, I didn't have any problems with this tape sticking to my ductwork.

Best hvac tape ever, ensures air seal on metal duct seams of all kinds. Expensive but well worth the price. Foil is thick and butyl sticks to nearly everything.

Purchased to repair some A/C Duct work in the Attic. It's a little hard to get the white backing off the tape but once this stuff is put in place its not coming off without a fight. It's a bit pricey but you will only have to do the job once. Well worth the money.

It is a good product, however Amazon has sent me 1 1/2" wide tape. I used it right away, then checked my order to find out that it was too late to see my order has been 3" wide tape.