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Your cart is empty.GREAT STUFF PRO Gaps & Cracks Polyurethane Foam Sealant is a gun-applied, insulating foam sealant that expands up to 3 inches to take the shape of gaps, creating a long-lasting, water-resistant and fire block seal around plumbing and electrical in basements, attics, and more. Made in the USA.
Jen
Reviewed in the United States on January 9, 2025
I like being able to bulk buy this product and have it delivered. Only complaint is it does take 1-2 weeks to arrive but if you plan for it, it's a great time saver.
Chrystal McDaniel
Reviewed in the United States on January 1, 2025
Buy an extra cleaner of you are going to stop start. Overall use was, it did what was needed. The product performed as well as advertised. Will use again.
Chris Slade
Reviewed in the United States on May 21, 2024
The gun and cans where easy to use. Clean up worked well
Mobi-wan Canobere
Reviewed in the United States on November 3, 2024
I had no idea how much I was going to need to insulate the gaps in my new 30 X 30 building. I was able to the entire perimeter with less than one can! The tips are no good as the foam pressure blows them off but the 2' wand minimizes the effort of having to bend over. The trigger adjusts the flow, plus the flow knob gives a further refinement. When installing the cartridge, spin it on fast or the product will come out. Good news is the attachment ring is made of a non-stick plastic so it's easy to peel off. Get cleaning can to clean out the wand when you are done. Great stuff!
Unkopidr
Reviewed in the United States on January 2, 2024
I purchased a modest, relatively small (400 gal, "6-seats" but really 4) hot tub and installed it on my upper deck earlier this year, a big project both requiring substantial strengthening of the deck itself and then significant improved insulation for the tub itself, including panels beneath the deck where the tub sits, panels inside the spa cabinet, and foam for inside the base and coating the tub seats within the cabinet. I ordered this spray foam for the latter (base and seats). I used every can of it but was also able to install a nice 3" insulated floor and a good 2" shell around the seats within the cabinet. It took a little patience, as I had to put just a bit at a time in a given spot, especially on vertical or partially inverted surfaces. Then, as the foam dried and left something to "bite," I could come back and add more and thicker quantities at a time. I can tell that the tub is now MUCH more efficient at both heating and retaining heat than how it originally came, almost completely uninsulated. Separately, I added 1" foam sheet insulation to the cabinet walls and more 1" foam sheets to the underside of the deck and both of those helped as well. In the process I learned the following:SHAKE THE CANS VIGOROUSLY FOR AT LEAST A MINUTE, IF NOT MORE. That makes a huge difference in expansion and getting most from each can.Spray with the can nozzle pointing down, so all the goo finds its way out.Don't do too much at a time, or the weight of added foam will collapse the lower layers.Keep a towel or sheet of wood or cardboard beside your work space to divert any messes while in-process, as well as a can of acetone & paper towels to clean up and keep the tip of your sprayer clean.Good stuff!
Quigdaddy
Reviewed in the United States on July 10, 2023
I bought this kit to seal the edges of sheet foam between studs in my workshop, as well as seal gaps in my drafty basement. I was a bit skeptical about how much I would get out of the kit...seemed like not much, but I was dead wrong. I did my entire 400 s.f. garage (10' high walls) with 3 cans. I also used 3 cans of the regular big box store stuff and I estimate that all 3 cans of the "non-pro" are the equivalent of around 1/3 of a can of the pro. It also sticks to horizontal surfaces much better than the regular stuff. If you look around my garage all of the drips and dribbles are from the regular stuff not the pro foam. Easy to clean with included cleaning solvent. Easy to use. You have a lot of control over how much comes out and you can vary the speed you move the gun as well. Highly recommend this product.
J. Bales
Reviewed in the United States on February 13, 2023
I purchased this kit to work on air sealing my 1980's house. So far it has worked great. I've done most of what I was intending and have only gone through 3-4 cans. I've done around all of the vents and other ceiling penetrations and around the wall headers the best I could in the attic, as well as all of the plumbing penetrations throughout the house, as well around all of the HVAC vents inside the house. I have a bit more to do in the attic, but I don't expect to exceed 6 cans for the whole house (a 3,000+ sq/ft house, BTW). Being fire block rated, they are suitable to use around electrical boxes, which is nice. The gun works really well. I haven't had any issues with connecting the cans or any leakage. The foam doesn't come out uncontrollably like they do with the spray cans, and the flow is remarkably controllable with the trigger. The cleaner helps keep the gun clean. I wish it would spray upside down, but otherwise no complaints. It's a really great product and 100% recommend.
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