Great Stuff Pro Gaps & Cracks – 24 oz Fireblock Foam Insulation Sealant – Closed Cell, Polyurethane Expanding Spray Foam Insulates & Seals Gaps Up to 3″, Pack of 12 with Standard Gun
$193.79
Price: $193.79
(as of Aug 16, 2025 05:32:24 UTC – Details)
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.
Is Discontinued By Manufacturer : No
Package Dimensions : 16 x 12 x 12 inches; 19.51 Pounds
Item model number : KTFM 20030
Date First Available : March 9, 2017
Manufacturer : Dow
ASIN : B06XHQ26GY
Best Sellers Rank: #77,815 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #257 in Hardware Sealers
Customer Reviews: 4.4 4.4 out of 5 stars 605 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
USA Manufactured: Proudly made in the USA
Seals Gaps Up to 3 Inches: Fills and insulates larger penetrations around framing, pipes, vents, electrical runs, and sill plates; expands to form a water-resistant, airtight barrier
Fireblock Rated for Code Compliance: Orange color makes it easily identifiable as a fireblocking sealant; designed to slow the spread of flames and smoke through concealed spaces
Reusable Gun-Grade Formula: Use what you need, then close the valve; can remains pressurized and usable for future applications when left attached to the foam gun
Reduces Energy Loss: Helps prevent up to 40% of heating and cooling loss from air leaks, improving energy efficiency and lowering utility bills (U.S. Department of Energy)
Fast-Setting and Trim-Ready: Tack-free in 3–10 minutes and ready to trim in 60 minutes; allows for efficient application and cleanup on the job site or during home projects
Versatile Bonding: Strong adhesion to most building materials; ideal for both interior and exterior use (must be painted for UV protection)
Complete Foam Sealant Kit: Includes 12 x 24 oz Great Stuff Pro Gaps & Cracks; 1 AWF 1000 foam dispensing gun; 2 plastic nozzles; 2 extension straws; 2 x 12 oz foam cleaner
Customers say
Customers find the foam sealant performs well, with one noting it works better than simple foam cans. The product is easy to clean and apply, with good value for money, and customers appreciate its ability to control flow and adjust to tight spaces. The seal quality receives mixed feedback – while some say it seals leaks effectively, others report issues with leaking cans. The foam quality also gets mixed reviews, with some saying it’s good while others report it coming out all over.
6 reviews for Great Stuff Pro Gaps & Cracks – 24 oz Fireblock Foam Insulation Sealant – Closed Cell, Polyurethane Expanding Spray Foam Insulates & Seals Gaps Up to 3″, Pack of 12 with Standard Gun
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$193.79
Alex Maxwell –
Great stuff is great!
I have been using this stuff for about 15 years. During covid locally ,the sources dried up ,so I was very pleased to find it at AMAZON. BECAUSE THIS IS REQUIRED BY CODE I was using the smaller cans which don’t go nearly as far, it is distortions how much further this stuff goes. It was very convenient to get the foam gun ,and cleaner in one box. This is easy to use but a couple things to remember, it is best to do it all once as not to waste cleaner, keep the product warm but not hot,and before using shake the can vigorously. Obviously cleaning the gun is super important.
Unkopidr –
Big improvement for the cabinet for my hot tub
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 –
Goes a LONG way!
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.
Amy Bailey –
Took a few cans to get psi up
Couple tips if you’re use to using larger canisters of closed cell insulation.The first few cans didn’t have the psi I’m use to. Only about 10% would stick to the wall. Wouldn’t be a huge deal but some of the area I was filling was a little far.Thought I’d try putting them under a little more heat. Put them about two feet from a small 1,000 watt heater for 45 minutes.BTW I had them in a room at 70F before this for a couple nights. It wasn’t enough.Heating these up seemed to do the trick. The increased heat gave it the extra psi to hit hard enough and stick.You’ll still have to plan a little more if you’re use to larger canister type sprays.Inly about half the can will have a fair amount of pressure. The rest you’ll need to put directly on.It’s possible I could have just heated them up more. I wasn’t sure how much was to much.For the R and sf, I think it’s a pretty good deal.Also. I had no problem with anything clogging. I went through 12 cans in a row and had no problems at all. I’m guessing the people who had problems, probably didn’t read the directions about how to change cans correctly.
J. Bales –
Great Product. Works Like a Charm
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.
Nicole Hoyle Hedington –
Perfect
This spray works well, the quality is good for your money.