Internet #302091382

Model #1542730

Store SKU #1003055450

1.89 in. x 33.9 yd. Foil Mastic Sealant Tape

  • Ideal for sealing HVAC systems and sheet metal
  • Creates a permanent water-tight seal
  • 0.489-mil thick duct tape for strong adhesive application
  • See More Details

Frequently Bought Together

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Price:
$2498

Product Overview

Nashua Foil mastic Sealant Tape seals and seams low, medium, and high pressure sheet metal duct systems and UL listed flexible, non-metallic ducts. Aggressive butyl rubber adhesive provides a permanent air and water-tight seal. Nashua Trusted Tapes get the job done right, the first time, every time.
  • Great for indoor/outdoor sealing of low, medium, and high pressure HVAC systems and sheet metal
  • High performance butyl rubber adhesive provides a permanent waterproof and air tight seal
  • Meets code requirements for sealing UL listed, non-metallic duct connections (UL 181B-FX)
  • Verified by SMACNA testing and research institute for sealing rigid sheet metal ducts
  • Mold and mildew resistant
  • Offers a cleaner alternative to mastic putty process
  • Thick and durable foil backing conforms securely around duct and corners
  • Can contribute toward satisfying EQ credit 4.1 (low emitting materials) under LEED
  • Low VOC (Volatile Organic Compound) content

Info & Guides

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Compare Similar Duct Tape

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1.89 in. x 33.9 yd. Foil Mastic Sealant Tape
2.5 in. x 60 yd. 324A Premium Foil Tape1.89 in. x 54.7 yds. 510 Professional-Grade Gaffer Tape in Black
BrandNashua TapeNashua TapePolyken
Name1.89 in. x 33.9 yd. Foil Mastic Sealant Tape2.5 in. x 60 yd. 324A Premium Foil Tape1.89 in. x 54.7 yds. 510 Professional-Grade Gaffer Tape in Black
Price
$2498
$2946
$3075
/roll
Ratings
(77)
(0)
(25)
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Specifications

Dimensions

Tape Length (yds.)
33.9
Tape Width (in.)
1.89
Thickness (mm)
.489

Details

Color Family
Metallics
Features
No Additional Features
Feet per roll
101.7
Kit
No
Material
Aluminum
Maximum application temperature (F)
200
Maximum hold temperature (F)
90
Minimum application temperature (F)
40
Minimum hold temperature (F)
-20
Number of Rolls Included
1
Returnable
180-Day
Tape Design
Silver

Questions & Answers

17Questions18Answers

Since I already have this tape and would like to use it to seal a new rigid metal gas dryer duct,...

Asked by JM September 8, 2020
1
Answer

Thank you for your question. Odds are that the tape will not remove perfectly from the duct surface as it is designed to provide a long term seal but you should be able to remove it or cut it away well enough to clean your duct and then re-apply. Best of luck with your project.

Can Nashua confirm what the low temperature is for this product, please? In one of the answers N...

Asked by JM September 8, 2020
1
Answer

Thank you for bringing the discrepancy to our attention. The product sheet requires an update. The correct low operating temperature for Foil Mastic is -20F.

Is there a recommended temperature range for this product if used in an unconditioned attic?

Asked by Mason June 24, 2020
1
Answer

Thank you for your question. Nashua Foil Mastic Sealant Tape, once installed, has an excellent high/low temperature range from -20F to 200F.

What's the difference between this and foil tape?

Asked by DIYer June 20, 2020
1
Answer

Thank you for your question. Nashua Foilmastic is actually a foil tape - the difference between the foil tape products Nashua offers is the adhesive formulation. This particular adhesive is an extremely thick butyl rubber formulation that bonds permanently to surfaces, fills gaps, and provides a water and air-tight seal. This particular product has also been evaluated for use on pressurized sheet metal duct systems and is code-approved for use on flexible ducts.

Need to patch a/c duct leaks in the ceiling of a FL home (high heat/humidity location) where the ...

Asked by GatorGal June 11, 2020
2
Answers

Thank you for your question. While the product does have a rubber scent due to its raw materials, we do not have any data specific, nor is there any standardized testing, to evaluate how long that scent might be detectable and/or problematic for persons with chemical sensitivity. As with any tape application, we recommend a controlled test prior to full installation.

There is a smoke-like smell that the tape is emitting now that it’s installed. Will that cure and go away?

Asked by JP June 9, 2020
2
Answers

Yes it should

can this be used for sealing in the wall range hood vent duct joints?

Asked by bk May 29, 2020
3
Answers

Yes

what would be the best thing to use to clean duct before putting this on

Asked by paul February 23, 2020
2
Answers

A dish soap and isopropyl alcohol. I use Dawn dish soap and rubbing alcohol.

Is this tape appropriate for sealing a gas dryer vent duct?

Asked by Oarsman December 14, 2019
3
Answers

Yes, it could be used for that.

How long after application can heat be turned back on and/or leak tested?

Asked by LK December 11, 2019
2
Answers

Thank you for your question. You can leak test and/or activate the system immediately after installation. Best of luck with your project.

1.89 in. x 33.9 yd. Foil Mastic Sealant Tape - page 2

Customer Reviews

  • 77 Customer Reviews
  • 4.7 out of 5 stars overall
100% of customers recommended.
Overall Ratings
5star-icon(63)
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Used for ill-fitting duct vents
Quality :
5
Value :
5
I used this table to seal around the ill-fitting ducts in my 20 year-old home. I scrubbed the wood sub-floor with water and detergent and also cleaned inside the metal vents with acetone. The tape was easy to apply and mold around the corners. As others have said it is hard to sepatate the tape from the backing. I therefore started it once and just peeled back as far as length of tape needed. As the pieces I needed were quite short this was easy to handle.
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The Nashua Foilmastic Sealant Tape, although expensive, is a great product. I am currently worki...
The Nashua Foilmastic Sealant Tape, although expensive, is a great product. I am currently working on sealing the HVAC ducting that runs throughout the crawlspace, branching out from the distribution plenum. None of the ductwork was ever sealed and I am guessing that I was possibly losing 30-50% of the heater output (judging by how warm the crawlspace was during the middle of the winter). I plan to brush or wipe mastic sealant on the joints of the adjustable elbows, but am using the Nashua FoilMastic Sealant Tape on the straight runs and especially where the ducting attaches at the distribution plenum. I will also be sealing the cold air return runs to see if we can cut down on the dust, vapors and whatever else is blown back up into the living spaces when the heater is operating. The Sealant Tape is fairly easy to use and, because it is somewhat flexible, lays down along curved surfaces fairly well. Be sure to clean the ducting before applying the tape and then smooth and secure the tape fully with a small artist's squeegee. If used correctly the squeegee will easily press out most wrinkles. About the only difficulty for me was separating the backing from the tape, but that probably has more to do with bad eyesight and limited space to work in than anything. Using a sharp knife instead of a fingernail helped a lot. Other than that, I am very impressed with the Nashua Foilmastic Sealant Tape. By the way, Home Depot had the best price of any online reseller or local hardware store. So far, with only the distribution connections fully sealed, I can feel--and hear--a huge difference in the output. The furnace is cycling less often and it runs for a shorter period of time to heat up the living spaces. It is much quieter, especially in the living space near the furnace. I can't wait to see the results after all the ducting runs are fully sealed and insulated.
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3
0
I have done a bunch of things around my home to make it more energy efficient. To date, I've ins...
Quality :
5
Value :
5
Seeds Program Review
(What's this)
I have done a bunch of things around my home to make it more energy efficient. To date, I've installed all new windows and sealed all of the doors, I've even placed child proof plastic prongs in each of the outlets along the outside walls of my home to stop air leaks. So, when I saw the 1.89 in. x 33.9 yd. Foil Mastic Sealant Tape available, I grabbed it immediately. I had installed a new more energy efficient central A/C system several years back, and I did seal the ducts in my basement with both foil tape and mastic, however, there are still obvious air leaks. This 1.89 in. x 33.9 yd. Foil Mastic Sealant Tape will take care of that.
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1
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Nashua’s Foil Mastic Sealant Tape is tough, strong, and really sticks and seals! The ductwork in ...
Quality :
5
Value :
4
Seeds Program Review
(What's this)
Nashua’s Foil Mastic Sealant Tape is tough, strong, and really sticks and seals! The ductwork in my unfinished basement leaked hot air, wasting energy and money, so I set up to seal the seams. There are an assortment of products to seal your ductwork, but if you need a tough tape that will stand up to temperature and vibration, Nashua’s 1.89 in. x 33.9 yd. Foil Mastic Sealant Tape (Model # 1461664) is great! Regular “duct tape” is typically a sticky mess that doesn’t seal well, and degrades. Thin foil tape works but tears easily. Nashua’s foil mastic sealant tape is tougher, stronger, and feels like it’s going to make a permanent seal, even if the ductwork flexes. It’s “peel and stick”, so it’s easy to measure and cut to length. Then carefully peel off the backing (the blue plastic in the pictures) and apply to the ductwork seams. Position it carefully - once it’s pressed in place it can’t be removed easily! Hints for a good result: - Clean the work surface - this goes for any tape - nothing sticks well to dust - Use scissors to cut the tape - you *can* tear it, but it leaves a ragged edge that makes it difficult to remove the backing - Press in place solidly - the thickness really seals well, but it needs a firm hand to help it conform to the surface Not inexpensive, but worth it for a good result that should last. Note: We received this item free from Home Depot’s “Seeds” program. Home Depot only asked that we provide an honest review.
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5
0
If you have ever worked with this type of tape you will know it's a little trickey. The tape is v...
Quality :
5
Value :
5
Seeds Program Review
(What's this)
If you have ever worked with this type of tape you will know it's a little trickey. The tape is very sticky and if you let is curl back and touch its self it maybe stuck permanently. Having said that the tape works very well at sealing connections in duct work or at attaching foil backed insulation around ridged duct work. I have used it in both applications and found out that it works very well. And the plus is that in two years it will still be holding and not dry out like "duck tape" tends to do. I have included a photo of the duct above my vent hood over our range connected and sealed with the foil tape.
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3
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Not all duct tape is approved by code for use on ducts. In fact, most of it is not. But this is...
Quality :
5
Value :
4
Seeds Program Review
(What's this)
Not all duct tape is approved by code for use on ducts. In fact, most of it is not. But this is the good stuff. Meets UL181 specs for use on sheet metal and listed Class 1 flexible ducts (most of the UL listed plastic-type duct). This is a foil-type tape that meets the specs for all pressures and velocities of ducts and makes a very tight and permanent seal. Your building inspector will like it. If you have ever done any remodeling work, you may have run into older ducts sealed with cloth-type duct tapes that were not UL listed. After a decade or so, these tapes often turn brittle and the adhesive turns to dust. This is disaster for a ventilation system that needs to be sealed tight to make sure that there is no waste and leakage in heated or cooled air. After drywall is installed, it is nearly impossible to repair this type of problem without huge cost. Even if you don’t have a forced-air duct system in your building, the construction crew often installs ducts for clothes dryers, bath fans and kitchen range hood exhaust ducts, and this is the tape to use to insure that there is no leakage. Clothes dryer kitchen exhaust ducts and cannot be secured with screws (by code), so a strong tape that can withstand heat and moisture is your best choice, and this is a good one. Better yet, it is made in USA. Take your time, spend a little bit more now to do it right and eliminate problems later, then you will have a job that will last.
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3
0
The aluminum foil tape is really great product. This tape to be much more of a commercial grade a...
Quality :
5
Value :
5
Seeds Program Review
(What's this)
The aluminum foil tape is really great product. This tape to be much more of a commercial grade and thicker aluminum layer with strong adhesive making robust material. This is an excellent tape for the HVAC projects. No putty work needed to seal the duct work. This tape that can be used for sealing off low, medium and high pressure systems of duct work.
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An excellent tape for the HVAC projects. You do not need to use the old fashioned putty work to s...
Quality :
5
Value :
5
Seeds Program Review
(What's this)
An excellent tape for the HVAC projects. You do not need to use the old fashioned putty work to seal the duct work. This is a very high quality sealant tape that can be used for metallic or non metallic, flexible or rigid duct work to seal off low, medium and also high pressure systems. Nashua is the trusted name with all the HVAC personnels for many years, and it is proudly made in USA.
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dont put this on anything you plan to remove it...
dont put this on anything you plan to remove it from in the future. it seals fantastically. i used it for my water heater flue. the butyl tape is very sticky and if you take a plastic spatula, putty spreader or credit card to smooth it out, it works really well. the foil tape allows you to shape the tape to the location you are taping. it does not have to be flat and smooth. of course a jagged surface wont work, but something with a flat lip edge is ok. just make sure it is clean and dry and you should have a permanent seal wherever you put it.
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