Model # 248314

Internet #100029171

GREAT STUFF 16 oz. Big Gap Filler Insulating Foam Sealant

Discontinued GREAT STUFF

16 oz. Big Gap Filler Insulating Foam Sealant

  • Easy application for gaps greater than one inch
  • Air-sealing and insulating saves up to 20% on home energy costs
  • 16 oz. Big Gap Filler Insulating Foam Sealant
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Product Overview

GREAT STUFF Big Gap Filler Insulating Foam Sealant offers the same benefits as GREAT STUFF Gaps and Cracks but fills gaps larger than 1 in. So it's great for creating larger weather-tight seals to stop drafts and keep critters out. Plus, like all GREAT STUFF products, it's airtight, paintable, stainable and sand-able. It's polyurethane-based and perfect for all sorts of materials like wood, drywall, metal, masonry, glass and most plastics.




Warranty / Certifications

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Customer Questions & Answers

Is the can and it's tube re-sealable?

Asked by: Anonymous
Yes, after a fashion (for great stuff in general). Take a 3-1/4 in nail (12d) and slide it about half way into the tube. With the can UPRIGHT, slightly pressurize the tube (this re-liquifies the product, you'll see the foam re-liquify in the tube). Later, when you want to use it again, to remove the nail, squeeze the tube (where it sticks to the nail) here and there with a pair of pliers to break the seal, and then the nail should pull right out, grab onto the head of the nail with the pliers and pull/twist. It'll keep a month, maybe two, I've gotten more than a dozen uses out of single cans across the span of days this way. If it doesn't dispense properly, it's been too long - just pitch it and start a new can.
Answered by: aLowFlyingDonut
Date published: 2016-06-17

how do you remove the sealant from your hands?

Asked by: Paul
Nail polish remover Acetone as per can instructions
Answered by: Bo
Date published: 2016-11-12

Can I use this to seal gaps in the window around the air conditioner? If yes, which product do you recommend?

Is this better than pillowy insulation squares?
Asked by: Chrissy
yes and any depending on the size of your gaps...I do this every year on my removable AC units (I have 4 in the house)
Answered by: Caerdic
Date published: 2016-07-27


Asked by: VONDA
It would fill the holes and cracks (if you could get the nozzle inside the material as this expands outward) but would in no way improve the integrity of the piece. Basically it will not help the issue nor make it better. This product is designed to fill in voids with the intention of preventing air flow and has no real structural value.
Answered by: chronosvandien
Date published: 2016-06-04
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Customer Reviews

16 oz. Big Gap Filler Insulating Foam Sealant is rated 2.5 out of 5 by 23.
Rated 4 out of 5 by from good choices of rigidity for different jobs works well. But a couple of things to watch. Buy only what you need for the job at hand. I bought half dozen cans a few months ago and now the stems are frozen and break when trying to activate the foam. The other is the can has to be inverted which makes it difficult to place the foam up high. OTherwise... it's great stuff.
Date published: 2012-02-29
Rated 4 out of 5 by from Sealing around soil stacks I have used this product to seal a soil stack at ceiling level in my house. It worked very well for that purpose. After application, just fish a wire through the straw and the valve and you can reuse it easily years later. The only thing is that you should be be very prepared to deal with any spillage from the can.
Date published: 2012-11-27
Rated 1 out of 5 by from Poor adhesion I have used Great Stuff many times, primarily the low-expansion Door and Window product. Had to fill some voids in an old shop building that I am renovating. The corners have gaps between the framing and the exterior siding (1x8 redwood shiplap applied vertically). Great Stuff Big Gap Filler seemed perfect, but it would not adhere to the fir framing or the redwood siding. It just kept slumping to the bottom of the openings and spilling out. I think the regular Great Stuff would have done a better job on these 2-inch by 3-inch voids. Now I have to clean up the overspill and try to stuff fiberglass in and around the hardened clumps of foam.
Date published: 2012-06-20
Rated 3 out of 5 by from Good product for a "one time only" application.(all of can must be used) I used it for filling crackes and joints in the Ductwork of a Home Heating Furnace. This product really expands so it can be used to fill large gaps between Solid Foam Insulation. The downside is that the plastic screw-on "Flow Trigger Valve breaks off easily. It is much too flimsy and with that broke I had to waste about half of the can. I could not get spare triggers/nozzles from the store I bought it from and their attitude was "tough luck". Also, I noticed the product left over in the Discharge Tube dried very solidly and I doubt if I could have used it again even if the trigger had not broke. No warnings about this were given.
Date published: 2013-10-23
Rated 1 out of 5 by from Not impressed! Out of 4 cans purchased only one actually did a semi decent job. I still have 2 cans left and would return them to the supplier as suggested (large home improvement store) for a refund as they actually sold expired product. However, they do not give refunds for this product, nor will they replace them. So I write off Great Stuff, forever! It was very messy, did not stay where sprayed, after shaking for 2 minutes the foam did not expand, did not adhere to the foundation nor the wood of the foundation. I am sure it is a great product, but I cannot recommend it. Great Stuff so far has only accomplished one thing - - Great Expense.
Date published: 2012-10-16
Rated 1 out of 5 by from Have used big gap filler previously, so did not expect 2 cans bought this summer (expiry date on both May 2013) to fail. The stem on both cans broke, even tho I applied a slow gradual pressure to the applicator "trigger". Both cans had started to leak where the stem exits the can, but no foam came out of the tube. I shook both cans for more than a minute before I tried to use them - I probably shook the second one for two or three minutes after the first one failed to work. I bought the product at a building supply/hardware store 300 km from where Ilive, and 150 km from my country place where I had planned to use it, so taking it back to the vendor is not practical. It was a waste of money. My fall winterizing job did not get done.
Date published: 2012-09-07
Rated 4 out of 5 by from Shrinkage A product description I read said the foam was "no shrink". My application was to use the material for a reusable packing foam for an item I ship a lot. OK I was not using it for what it wa openly intended but thought it would be great packing filler. But, over the period of days I found the material had shrunk about 10 %. A I had a large tight fitting foam mold I found had to several times re-cut the mold on the inside and add padding around the outside.Perhapss it would have not shrunk as much if it had stuck to the outside of the container which I did not allow. But just making a given size of in open space does allow the product to shrink over a multi day period. Would a version other than "Big Gap Filler" have shrunk less?
Date published: 2013-01-12
Rated 3 out of 5 by from works great IF it comes out of the can..have returned several I have purchased several cans, whenIwent to use them a few months later the foam does not come out thru the straw but around the neck. I purchased just 1 and when I tried to use that one.....same thing. I could not get it to come out thru the straw/ I have used some of the cans and when they work they work very good. When I start a project, I want to finish andnot have to drive to the store to get a replacement.
Date published: 2013-01-23
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