Great Stuff Pro Gaps & Cracks 24 oz Complete Kit – 12-Pack Foam Sealant with AWF PRO 8 in Professional Spray Foam Gun & 2 Cans of Great Stuff Pro Cleaner

This stuff is great, gets rock hard, fills big gaps no problem and 1 can goes a very long way. Follow the instructions and the gun works great and lasts. You will need more cleaner unless you are using a lot each time.

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!

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.

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.

Originally got it to fill some large gaps. I even ended up using it to fill a whole bay of a wall I had to fix. Easier than using fiberglass. I'm happy with how it came out.

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.

Just as described

The gun basket has a different thread than the foam canister, so it's not a simple twist on twist off installation. The foam was coming out all over the basket while I forced the canister to thread into the basket. Maybe they sent me the wrong gun for Great Stuff canisters, but it all came as a kit, so it should have worked fine together but didn't. The mess made it difficult to clean the gun because foam was all over it. And it cured on the outside of the gun while I was using the gun. The barbed tip of the gun did not hold the applicator tip or the plastic straw on the gun... the pressure of expanding foam in the tube pushed it off and the foam came out and got all over the place. I never did get a clear spray of cleaner out of the gun and used half a can of the cleaner to clean the gun after using only one canister of foam. At that rate, I'll need 6 cans of cleaner per dozen canisters case of foam to prevent ruining the gun by inadequate cleaning. The cleaner is almost as expensive as the foam. The foam canisters do contain a lot of foam. I was pleased by the volume of foam dispensed from each canister. The gun worked fine when applying foam near the floor and walls, but not so well near the ceiling or roof rafters where the canister sticking up prevents close access. So, I tried to use the straw, but once it blew off of the barbed tip, the foam was too slippery to keep it on tight and it kept blowing off and foam went everywhere. Same problem using a 1 foot plastic tube... holding and observing the tube with one hand to dispense properly and the gun with the other hand was a disaster. When the tube blew off the end of the gun but I didn't see it. Foam all over the place (and me) before I realized what happened. Make sure you wear your old clothes when you do this job. The foam doesn't come off of fabric... but it might waterproof it if a few spots though. Looks ugly...