🚪 Seal smart, save big—your gaps don’t stand a chance!
GREAT STUFF Window & Door Gap Filler is a yellow, minimally expanding polyurethane foam sealant designed for professional-grade insulation. It features a low-pressure formula that remains flexible after curing, preventing frame bowing while providing an airtight, water-resistant seal. The included straw applicator ensures precise application in tight spaces. Quick curing times (20 minutes tack-free, 1 hour trim-ready) make it ideal for efficient project completion. This 8-pack bulk set offers excellent value for comprehensive gap-filling needs.
B**Y
Repeat purchase
Seals Nice. Works on drafts and Water leaks. Easy to trim off excess. Bought some two years ago still holding strong, just repurchased some more and will probably re-purchase again
H**X
messy but good
Used for insulating newly installed windows. It does a good job, but is hard to know when to stop and so can have a lot of waste.
J**N
Great stuff is good stuff
Just bought a house and trying to fill all the small holes and cracks and gaps and it seems to do well at that. I don’t know if it was just me but it seemed after shaking it and starting it I was racing to each spot I needed filled as this was like a can of pringles where once I popped it, it didn’t stop until the can was empty
H**5
Great deal right here.
Great product, great price. Didn't like the delivery. Other than that thumbs up.
E**E
Have to use it, but it's a pain
My partner and I always refer to this stuff as "alligator skin" - because no matter how careful we are, someone always ends up with a little bit of it on their skin somewhere, and your epidermis will feel like a gator's for a week or so. I wish there was a product to remove extra foam, like there is for superglue. I also hate how each can is single-use, because the hose will clog after use and you cannot squeeze more out: super wasteful.
M**E
AWSOME.
THE GREAT STUFF is GREAT. Just remember to wear gloves because it can be super messy. Drys fast and fills those gaps. Also good for a little gift to my neighbor that i dont likes mailbox. Good luck getting The Great Stuff out of your mailbox. maybe u will think twice about mowing your lawn at 7AM...
A**H
river dave
stuff is horrible, expands way beyond application, would never buy this stuff again, it even pushed out nailed OSB, luckily in hadn't tried it on my window installation first, stick to cans offered in box stores, at least it does what it says "minimal expansion"
N**.
A LITTLE goes a long way!
Used up a can by applying it too slowly! It expands quite a bit! Overall great product! Just remember to use gloves!
Trustpilot
3 weeks ago
5 days ago
