Internet #202907021

Model #AC-DMS 0.5

Store SO SKU #1000682558

1/2 Gal. Water Base Duct Mastic Sealant

  • Features a weather-resistant design
  • Specifically designed for easy application
  • Suitable for use with fiberglass and flexible air ducts
  • See More Details
$1946

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Price:
$1946

Product Overview

Speedi-Products Low to high Velocity Air Duct sealant. Non Toxic adhesive sealant. Used for permanently sealing sheet metal and flexible duct system joints. UL-181 listed rigid fiberglass and flexible air ducts. Water based non flammable fire and weather resistant. Easy application and clean up.
  • Low to high velocity air duct sealant
  • Used for permanently sealing sheet metal and flexible duct system joints
  • UL-181 listed rigid fiberglass and flexible air ducts
  • Water based non flammable fire and weather resistant
  • Easy application and clean up
  • Consult your local building codes for approved installation practices

Info & Guides

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1/2 Gal. Water Base Duct Mastic Sealant
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BrandEverkemSpeedi-ProductsSpeedi-Products
Name10.1 oz 100% Silicone Sealant in Clear1/2 Gal. Water Base Duct Mastic Sealant1 Gal. Water Base Duct Mastic Sealant
Price
$1123
$1946
$3929
Ratings
(16)
(35)
(35)
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Specifications

Dimensions

Product Depth (in.)
6
Product Height (in.)
8.0
Product Size (oz.)
64.0
Product Width (in.)
6.0

Details

Color
Light Gray
Full cure (hours)
72.0
Minimum Temperature (F)
0.0 °F
Product Weight (lb.)
5.5
Returnable
180-Day

Warranty / Certifications

Manufacturer Warranty
1 Year

Questions & Answers

33Questions18Answers

Can this be used for exterior applications

Asked by DAVID March 9, 2020
2
Answers

The product is water soluble. So it can only be used outdoors where it will be protected from moisture.

Can this product be used directly on flexible duct to seal where it enters main trunk line?

Asked by David January 23, 2020
1
Answer

Yes, refer to Instructions in the Product Overview section of web page. Secure flex duct per manufacturers instruction, then apply 2" band 20-40 mils thick to seal the connection.

Where is expiration date on bucket? Is lid supposed to be sealed? I was able to pry lid off with my fingers.

Asked by SushiBreath January 17, 2020
1
Answer

There is a production date on the top of the lid. First 6 digits is the date, last 2 digits is the batch. There should be no reason for someone to open the bucket until it is purchased for use. But you are correct, there is no seal to indicate tampering.

Once you open bucket, how long will it keep?

Asked by SushiBreath January 15, 2020
1
Answer

Shelf life of an unopened container is 2 years. We do not have data on how long an opened container will last. For an opened container we recommend using plastic wrap laid directly on remaining product to seal it from the air inside the container. Keep tightly closed in a dry cool place away from heat and do not let freeze. This should extend the life of the product once opened.

Can this be applied to my gas furnace sheet metal ducts while furnace is running heat in winter?

Asked by SushiBreath January 14, 2020
4
Answers

No. This is a sealant. If there are any air leaks it will not seal them properly. The air pressure will cause holes in the mastic. I believe the directions say to let it cure for 24 hours before using.

Will this stick to plastic?

Asked by Andy June 30, 2019
3
Answers

It will adhere when dry but not the standard application for this product.

Can I use this to seal any small leaks in the seams of the evaporator metal case? The evaporator/...

Asked by dangramm June 19, 2019
2
Answers

The product has worked but I did allow the cure time. I used the product on a house roof over a year ago and it's still working

Elastomeric underlayment

Asked by Eric May 14, 2019
1
Answer

The product is not tested for this application so there is no telling it's performance.

I am trying to air seal my basement rim joist. From youtube, everyone is using great stuff to air...

Asked by newhand April 23, 2019
2
Answers

This is not what the product is designed for. Will it work? Since it hasn't been tested there are no guarantees. The product is water soluble so if you do decide to try this take that into consideration. It will bond with wood surfaces and will most likely stay in place over time.

I'm installing a UV anti-microbial surface treatment system inside a fiberglass duct board supply...

Asked by Jay February 12, 2019
1
Answer

We've uploaded a Technical Bulletin and Application Guide to the webpage. Please check the website for this information in 24 hours.

1/2 Gal. Water Base Duct Mastic Sealant - page 2

Customer Reviews

  • 35 Customer Reviews
  • 4.7 out of 5 stars overall
95% of customers recommended.
Overall Ratings
5star-icon(24)
4star-icon(9)
3star-icon(2)
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Connecticut
Good for sealing drafty windows!
Quality :
5
Value :
5
The casings around our windows were very poorly sealed. This caused numerous drafts in our house. After taking the casings apart, I discovered large gaps between various construction materials around the windows. So, I bought this bucket of sealant to fill the gaps. This stuff is awesome. Just use a regular spackle knife to spread it over anything! The sealant is thick, so it doesn't drip or run through cracks. It fully-fully cured after 48 hours near the drafty windows in the winter. I attached before and after pictures. Nice!
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Rating provided by a verified purchaser...
Rating provided by a verified purchaser
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Worked as described...
Worked as described
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Easy to use and easy clean up. Great stuff....
Easy to use and easy clean up. Great stuff.
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I haven’t yet had a chance to tackle that project...
I haven’t yet had a chance to tackle that project but it’s coming up and with any luck I’ll be able to update this rating.
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This is a thick, pasty, fibrous, grey-colored mastic that worked...
This is a thick, pasty, fibrous, grey-colored mastic that worked great for me. Fills every gap (of course you should use a mesh tape for gaps bigger than 1/8"), doesn't run even when working overhead. I used about 1/3 of the tub so far but I'm about 1/3 done, still have many more joints to seal in my system, my house is 2400sf. Might have to buy a tube instead of a 1/2gal tub just to finish. Bought on-line for pick up at my store, I wished they'd just stock this brand instead of the other one (which doesn't get good reviews).
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Works well....
Works well.
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Great stuff...
Great stuff
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thicker than expecting....
thicker than expecting.
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Nice and thick. Does the job well....
Nice and thick. Does the job well.
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