3M Aluminum Foil Tape 3340, 2.5" x 50 yd, 4.0 mil, Silver, HVAC, Sealing and Patching Hot and Cold Air Ducts, Fiberglass Duct Board, Insulation, Metal Repair
29.76
3M Aluminum Foil Tape 3340, 2.5" x 50 yd, 4.0 mil, Silver, HVAC, Sealing and Patching Hot and Cold Air Ducts, Fiberglass Duct Board, Insulation, Metal Repair
· VAPOR SEAL TAPE: 2.0 mil aluminum foil backing (4.0 mil total thickness) with a strong, pressure sensitive acrylic adhesive is ideal as a vapor seal tape for duct closure. · HOT AND COLD TEMPERATURES: Combination of a foil backing and acrylic adhesive gives this tape a superb operational temperature range of -40F-300F (-40C-149C). · EASY RELEASING LINER: Poly coated kraft paper liner protects the adhesive and keeps the tape ready for use. · LONG LASTING: The foil backing serves as an excellent barrier against moisture, dust and many chemicals - making it strong, durable and long-lasting. · APPLICATIONS: Heating Ventilation Air Conditioning (HVAC), duct closure, vapor seal on reinforced fiberglass duct board, rigid fiber glass duct board, flexible air ducts and air connectors. · Listed for both UL181A-P and UL181B-FX
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craigReviewed in the United States on February 6, 2025
Purchased for A/C ducts in the attic, the insulation was torn and falling off. This seems to be top quality tape, very sticky, cuts with heavy duty scissors or shears, a little pricy, but you get what you pay for! All the other 3M products I purchased have been of top quality! I most likely will need a second roll of tape to really secure the duck work, it even looks good and professional, words often not used when I do a job!
tscottReviewed in the United States on January 5, 2025
If you need to use tape to stick something to your vehicle, this is the tape to use. I've used it the last few years to tape insulation around the bottom of my RV and works great. When you need to remove it, it does not leave any residue at all. It fairly easy to remove. Be sure you clean the area before trying to apply it, especially from moisture.
AustinReviewed in the United States on March 5, 2025
The gold standard in foil tape. This sticks really well. This tears very easily and can be installed on existing vents to fix air leaks. I've been doing this around my registers so air doesn't escape underneath the floor. Worth the price over cheaper foil tapes.
Tina NewshamReviewed in the United States on February 14, 2024
Great product but is covered in advertising for 3M. Good thing is I was able to remove the printing with thinners.
L HReviewed in the United States on April 4, 2024
This tape is easy to use and very sturdy. It does not easily tear apart and should last for a long time. We actually used this tape to adhere insulation to a home made grill. It worked great. The grill gets hot and the tape has stayed on securely. It proves that it will hold up for other HVAC projects too.
FFReviewed in the United States on June 4, 2024
This tape was used on an air duct of a large woodworking dust collector. I had to take apart a duct to clear some larger pieces of wood that got caught in a corner of the installation. This tape was used for the original installation, so I bought more of the same when it needed to be taken apart and redone . The original tape made it through freezing winter temperatures, and now the new tape is taking the springtime heat (accentuated by being near a west-facing wall) without any problems. Definitely 'thumbs up' for a product that works exactly as it should!
Amazon CustomerReviewed in the United States on November 10, 2023
This tape really works well. First off, you can cut off whatever amount you need for a job before peeling the backing off. It is not sticky until you remove the backing, but then it sticks as it should. The backing also allows you to cut down the length of the tape, thereby making tape that is less than 2.5" wide for tight spots. I have previously used some types of duct tape without the removable backing, and as the tape ages a while, it becomes stuck to itself and impossible to use; I don't think this product will have that problem. I would definitely but this again.
Phoenix LainReviewed in the United States on August 23, 2023
This is the good one, this stuff is tough too. I always like to have some on hand for projects around the house. You’d be surprised how useful this tape can be once you have some on hand. My dad always used this at work (HVAC) so I’ve learned over the years how to properly use this tape to make my A/C more efficient. This is great for taping up cracks around your furnace or condenser coil. You can also use it to tape the chill line near the outside unit if your lines have areas that are exposed, or if there are places that are beginning to be exposed. You can buy cheaper brands, but there’s some things you shouldn’t buy off brand, and this one of them. Buy the legit 3M tape, it’s worth it. It’ll save you money in the long run as you won’t constantly be having to patch up previous applications. I’m not a certified HVAC tech, but after riding with my dad from elementary school until I graduated, I do know to highly recommend this specific tape. This can also be used on small windows, such as the small window panes on some front/back doors, and for lots of other applications. If you’re a homeowner, I truly believe a roll of this tape should be in your home tool box.
SeleneReviewed in Mexico on June 8, 2018
Ninguna otra cinta había podido funcionar con el tubo del aire acodicinado; colocamos esta y ya lleva algunos días sin que se caiga.
Junaid DanishReviewed in India on December 21, 2022
Selling fake Product in the name of 3M Returned and again received same product.
LsiReviewed in Canada on August 7, 2018
This is thick foil tape with a high temperature acrylic adhesive designed for sealing attic bathroom exhaust hoses etc with prominent code compliance labeling. It has a much stronger smell than other foil tapes I have used--definitely more of a pro class product and 0.5” wider than common foil tapes as well. Due to its thickness, it is also less conformable than what is ideal for average furnace and duct seam sealing purposes. I prefer thinner general purpose foil tapes in that role (Climaloc, Nashua 322, 3M 3311 etc). This does provide an added layer of protection for applying to sharp irregular surfaces as it does not tear easily, but it is also thick enough for its edges to cut you if you aren't careful.
The TinknockerReviewed in Canada on October 31, 2023
I use this on clean, oil free duct work. Yes this is an expensive foil tape (cheaper if you buy it by the case) but the cold weather tack is effective and the adhesion will last for years even with the temperature cycles. I prefer the the thicker tapes (this is one of them) and 3M uses a quality adhesive. Tack is when the tape is first applied (TO A CLEAN SURFACE) and adheres to the surface. Adhesion is the ability to remain attached to the surface for a length of time and through temperature cycles. Flagging is the tape releasing from the surface (Adhesion has failed) and with the cheap tapes this happens in a few years. This is a pressure sensitive tape and MUST be smoothed down with an applicator and NOT just your hand. I believe in doing a job once and to the best of my ability and this tape has met my expectations
Siva VReviewed in Canada on September 4, 2018
Very impressed with how well it sticks and seals for my use case which was sealing air gaps in our HVAC system. The tape is wider and thicker than typical HVAC tape which is great. Definitely worth the cost and then some. My Price - $ 18.88