Ratings & Reviews for GREAT STUFF Big Gap Filler 20 oz Straw Indoor/Outdoor Spray Foam Insulation

Okay product

I initially liked the product when I first started using it, but when I went to use it the next day, it did not work properly and the straw popped off and the foam exploded from the top. I was only able to use it once. Not quite sure what happened or if I received a defective can.

Better Value than in-stock smaller cans

This larger more economical size was not an in-store option, but delivery was quick and well-packaged. Thank you, Lowes.

Does a great job

This is very easy to use. Read instructions first. If you have many gaps/holes to fill this will do quite a few. I just filled all exterior gaps where pipes from water, gas etc exit the basement. It does a great job of filling any voids that will help keep cold air and insects from entering your house.

Good Crack Filler

For horizonal application, this is a great product...filled, expanded, and held very well. I struggled with overhead application where gravity was an issue...wasn't able to grip the crack edges and had 1/4th the can fall on my head multiple times. Otherwise, if you are able to apply straight ahead, good!

Great for large gaps or even wide open spaces!

I got this to fix some foam insulation in the attic where I had to add some support for porch beams. My great spray foam insulation had to torn off in two locations to add some blocking. I wanted to add insulation back over these blocks and this did just the trick. It was tacky enough that it stuck to the raw 2x6's with no problems. It expanded out and cured nicely. You can hardly even tell that anything was ever done. I have use the normal great stuff for small cracks multiple times. Thi...

They say "Big Gap", I'm not so sure

After using normal "Great Stuff" around a door, and having it expand too much (had to cut it out to close the door, I learned about 'minimally expanding foam'), I wanted to see how the Big Gap worked. Not a scientific test, but as shown in the video, I really expected more. I've seen the regular Great Stuff expand about as much as this stuff did. It definitely would work to fill in gaps around a pipe or something, but I was expecting more. It works as easily as any Great Stuff product, just ...

Great foam

Great product to fill larger gaps. I had several holes from my kids now and arrow and from a tree falling into my shed. I used this to fill the holes and what a great product. Filled the holes, trimmed it and prepared it to finish

Large hole filled

This stuff really works well for filling in large gaps around pipes and lines. I used it to fill in around water pipe in the well house. It does come out fast so allow for it.

Great Size for Medium Jobs

Expands as described. Tall can is great for medium sized jobs. Used to patch holes in a soffit to stop a squirrel from getting in. Filled 1 1/2” hole without issue.

Fill those gaps!

Works like a charm! I’m so impressed with this, it filled the gaps & holes that I needed to be filled. Very easy to use and mess free! Little to no cleanup, just toss the can in the trash when you’re done, make sure to put the hose exactly where you need it!

As advertised, fills large spaces quick and easy

This expanding foam gap filler works wonders. You don't have to be too patient, as the foam expands rather quickly. The ability to fill in larger gaps worked great for me, as I wanted to seal off some areas behind my drywall where plumbing lines came through. The holes were bigger than I liked, and the space behind needed a large gap filler like this. It worked great and has stopped a small draft that was creeping up from my crawlspace. Wear gloves as this product adheres really well and is hard...

Good gap filler.

Does what it says it does. I had a couple gaps in the shed I couldn’t fill with rolled insulation and this fit the bill. I also filled a couple gaps in our chicken coop and will be sanding it down when we paint the coop. Definitely wear gloves and be careful that it sticks where you’re putting it at, because it can fall out if it’s not well stuck from the get go. A little falls and it pulls the rest with it. I had a little splatter, so safety glasses and gloves are handy things to have.

Awesome product that lives up to its name!

As we work on remodeling our 1927 home, there are lots of gaps to fill! This product lives up to its name, filling really big gaps insulating around some of our ceiling joists and throughout the attic. There are so many holes we are trying to patch, and this really does the job! You can use less than you think- wait a moment and let it really expand before coming back for another pass. You can see in the photos that we use it a ton on the old plaster/ lathe layer. We will be putting drywall on ...

Great product and easy to use

The big gap filler is super easy to use and fills decent sized gaps fairly easy. It comes equipped with the straw needed to use it. I would definitely recommend this product.

Big Can for Big Jobs

What can I say? Great Stuff is really great. In all honesty, the only difference I could really tell with Big Gap Filler is that it is a larger can than regular Great Stuff. To me, its a big gap filler because of the volume and not because it really works any differently, That said, it is nice to have the larger can for a larger job. I had several places that needed to be filled so the big can worked out well. The downside is that if you don't use it all at first application, the applicati...

Perfect for filling the gap

I would recommend this gap filler. Pros: -Installation straw is very handy. -Comes out fast and wet but expands does the job. -The can is large so it can do a lot at once. Cons: -Hard to reuse can unless you have an extra screw-on straw. -Messy to install. My photos show how lousy of a job I did because it was hidden in the attic. Otherwise, I would need to go back and shave it down.

Great Stuff Big Gap Filler

Great Stuff insulating foam sealant is U.S. owned and made in the United States. This big gap filler expands to fill, seal, and insulate gaps. It is great for reducing drafts and saving energy. Some of the uses include insulating around plumbing, filling under thresholds, gaps in bricks and rock. It is truly Great Stuff!

Great Product

This is amazing. I was surprised at how far the stuff expanded. It filled in a big 3" gap I had installing some windows in an old home. I used a knife to cut the foam and it didn't tear, cut smooth and even.