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Your cart is empty.GREAT STUFF? Gaps & Cracks is a polyurethane-based insulating foam sealant that fills, air-seals and insulates small gaps (less than 1 inch) inside or out. But you probably guessed as much from the name. What you might not have guessed is how easy it is to use (thanks to the straw applicator) or how it expands to take the shape of cracks and voids to form a durable, airtight, and water-resistant bond that eliminates unwanted airflow and helps reduce condensation.
Annette Sparks
Reviewed in the United States on February 3, 2025
I’ve purchased so many cans of this stuff no pun intended and it does fill up cracks very well. If it is used on a slick hard surface the foam doesn’t adhere as well. Also doesn’t stick on metal very well. I think it does ok sticking to wood and drywall. I used it to fill in cracks of the wall in a mobile home with metal exterior walls. I probably bought more than 50 cans.
H13
Reviewed in the United States on February 27, 2025
One can doesn't get you very far. I'm trying to do popcorn balls with this... I only got one side of 4 made.. I was hoping to get at least 4 full ones out of a can. But good thing I bought bulk I guess
Customer
Reviewed in the United States on February 22, 2025
Seems like they will do the job and not to bad of a price.
sid hall
Reviewed in the United States on February 14, 2025
I will purchase again.
Kris Miller
Reviewed in the United States on February 13, 2025
Seals great, expands as it should, I had no problem with adhesion, a great price for case of 12 I have an older home used in the basement around the foundation and filled holes and cracks it made a huge difference knocking out drafts and keeping out bugs and mice!
Courtney Hadden
Reviewed in the United States on January 5, 2025
I have trying to find a good gap filler that would work for a variety of projects. Not only is this the only one that is true to it's word on ability but it is the only one that fits my craft side of home improvement as well, it is the biggest bang for the buck so to speak.
mandy
Reviewed in the United States on January 15, 2025
Great price and it really works. Stopped the cold drafts from around my fireplace. It fills all the cracks and the price was unbeatable.
K L SCHMIDT
Reviewed in the United States on November 9, 2024
All the cans work and none came damaged. Could have been packed a bit better but mine arrived ok. These works just as well as the more expensive large gap filler can.
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