Gray 1/2 Gallon Acrylic Latex Duct Sealant by Red Devil 0841DS RD-DS 181

Arturo: Works well! Sealed up bunch of ductwork No air leakage at all! Strong good stuff!

United States on Nov 26, 2023

Theresa: I didn't need very much of this stuff, but this was the smallest container I could find. It was easy to put on, it sticks well, and all the seams in my ductwork are sealed.

United States on Nov 08, 2023

ChazChaz: Like a lot of other reviewers, the first bucket I got was cracked open and leaked in the box. It probably would have been fine anyway, but I returned it for another and the second was fine.

This was just what I needed for sealing ducts with terrible gaps. Because of very poor fit and total lack of sealing, I needed something I could gob into the gaps and do damage control. This stuff goes on well with a cheap paintbrush for thin layers, use a popsicle stick or paint stirrer for bigger beads.

United States on Jul 21, 2023

Sam: I bought this item filling up the holes rats invaded garage. It is super easy to apply and stands for cold weather. Recommend.

Canada on Dec 01, 2022

L. Wapo: As previously reported by many others, yet seems to keep falling on deaf ears, the container arrived cracked open and partially spilled due to poor packaging. The container was just thrown in a much bigger box with no support padding of any kind to keep it from having free roam of the box. Furthermore, the product manufacturer's poorly secured container lid is NOT conducive for shipping. It can easily pop open and clearly does... especially when shipped in a box much bigger than needed and with NO support padding at all.
Though the product itself is good quality, buying it local will avoid a spill during shipping issue.

United States on Nov 16, 2022

robertmcleod: was easy to put on and goes a long way

Canada on Jun 26, 2022

Karen Kerr: I used this for sealing forced air furnace ducting. It worked well and I have a lifetime supply, it goes a long way.

Canada on Jan 06, 2022

Laura F: Used to seal both return air and heat ducts. Applied exactly as advertised. Couldn't believe the difference it made to home comfort...

Canada on Feb 25, 2021

Amazon Customer: Unless you install HVAC systems for a living the smaller 1/2 gallon is more than enough. I did my new house, my neighbors new place and my 2 kids houses and still have some left. You wouldn't believe how much air loss comes out of you unsealed ductwork.
This red devil sealer is very easy to work with dries to a rubbery finish. Much better than the silver foul tape.

Canada on Feb 18, 2021

John Chancellor: Air leaking from your HVAC ducts can results in up to a 20% (or more) loss of efficiency. This is because many vents are not properly sealed. Often the ducts are sealed with a poor-quality tape which can result in loss of heated or cooled air. Over time, the duct tape can detach from the ducts, results in air leaks. Even worse is the poor or shoddy workmanship that fails to properly seal the ducts.

Our A/C unit was not cooling as efficiently, so I conducted a visual inspection of the ducts in our attic. I found multiple areas where the ducts were not properly sealed.

I first applied a high-quality HVAC aluminum tape to all the poorly sealed joints.

Then I brushed on the Red Devil Acrylic Latex Duct Sealant. I used a 3” paint brush and it took about 45 minutes to totally paint the sealant over all the taped joints.

The latex duct sealant is like a heavy paste and goes on very easily. Even though you could wash out the brush, I used an inexpensive brush and tossed it when I was finished.

I was very pleased with how easy it was to apply the latex duct sealant. I was even more pleased with the way it sealed up a large number of small leaks. It...

United States on Jul 31, 2020