3M High Temperature Flue Tape, High Heat Sealing Tape up to 600 degrees, 1.5 in x 15 ft Roll, Stops leaks from hot air ducts, Made in the USA, Silver (2113NA)

I use this to seal leaks on my portable air conditioner and it holds up really well all season. Every year when I take the AC out of the window I just replace it. Does exactly what I need it to do.

The most important thing to know is this is a very specialized product made to withstand higher temps than the more common "200 degree foil tape". Therefore you should expect some tradeoffs: this comes in a much smaller roll than the 200 degree stuff. It will work BEST on flue seams, where it will stick to itself and reasonably clean exhaust piping. If you have a "special use case" be aware this may not stick so well. My special use case was to "wrap" fiberglass insulation that wrapped pipes immediately coming out of my oil boiler. Because I'm using it for something it's not designed for, I can't knock points off. Anyways: I chose this because you are not supposed to wrap pipes with insulation close to the boiler, if that insulation is at all flammable. The cheap "foam noodle" will easily burn, and so will the nicer paper-backed fiberglass pipe insulation. The fire code restriction ends after 12 inches from the flue so DO NOT use any "plastic wrap" around fiberglass closer than that!. Anyways, this "worked" to let me put a surface and seal the insulation, but it's not meant for that and looks a little irregular. :-) Another good use: put a square of this stuff on a flimsy plastic parking pass that hangs off your mirror. The added weight is perfect to keep such things from flapping around in the wing. Tape a few pennies if you want even more weight.

I used this while changing my water heater vent pipes. Definitely good for sealing up mismatches in piping. Unfortunately I had to reuse a single walled elbow in between two double walled type b pipes. This worked well to keep them sealed and put. Where it didn't work so well is when I had gaps in between the pipe collar and my wall. There were two corners where the collar didn't quite cover up the hole for the piping to go through, so I opted to use this tape to keep the seal heat proof. It stuck well enough to the metal collar, but not on the wall, so I laid regular duct tape over this one to hold it in place. TLDR: Works well to tape metal together, but other materials like painted wood not so much. It's basically tin foil with adhesive.

Always an excellent product that lasts for many years, doing the job for which it was designed. Good up to 600 degrees F. when applied to a cooled-down pipe; heat will seal the tape to the metal pipe as the temperature climbs. Note: Some building inspectors discourage taping up furnace, clothes dryer, and water heater flue joints, so check your local building codes before using this tape, especially when selling your home. That said, this flue tape will help protect said joints from potential carbon monoxide leaks that might occur in both new and older flue vents. Make certain that you clean the metal surface before applying so that the tape's adhesive sticks firmly; a metal bristle brush will do this job nicely. My addendum added mid-December 2019: I just inspected my flue and furnace joints after the 3M tape has been in use for 2.5 years. Not a single sign of heat affecting the tapped-up joints, proving that 3M makes a solid product for this kind of job. Just had installed an Aprilaire 600 whole-house humidifier system on my Carrier gas furnace. I will be using this 3M tape again to seal all the connection joints for the round metal bypass pipe where it attaches to the furnace's hot updraft ductwork, and also around the the base perimeter joint where the humidifier attaches to the cool down flow ductwork. In the case of the later, you can also use a bead of silcone or other approved sealer, but I prefer using something a bit sturdier. So am sticking with the 3M tape, especially since I have a roll of it already in hand.

good stuff

This high-temperature tape is amazing! I used it on my heating system, and it holds up well under extreme heat. It’s easy to apply, and the seal is solid. No more issues with leaks, and the tape has stayed in place. A reliable, high-quality product for duct work.

The package arrive severely beat up and the edges of the roll were damaged, causing me to not even be able to pull off 4 inches of tape before it would rip from either side of the roll. Made it very difficult to use and not sure if it will function as intended. It did adhere well, and seems like it will stay put for a while, but wish I could have used it as a single piece all the way around instead of a bunch of small pieces.

I used this to tape my oven door back together. The handle couldn’t be fixed and landlord was no help so I tried this and it worked to keep the oven door from comping apart when the handle would come off. Used it over the top and inside of the door and haven’t seen any problems with oven temp at 425

Very good and very resistant, i used it to seal a broken electric oven door gasket.

great

muy importante para prevenir fugas de humo

Good quality does exactly as it is supposed to

This was delivered fast and is just as good as the big names, great price and great product!