Customer Reviews for GREAT STUFF 16 oz. Big Gap Filler Insulating Foam Sealant

I sprayed the product to seal a draft comming from the attic. The foam would not stick in the void and kept falling out.

This could be a great product but it is too messy to handle and use and is very expensive. If the cans were smaller and cheaper, it might be worth it, but not now. I have tried this a couple of times and wasted almost the whole can each time. I'm done with it. So many bad reviews here.

I want to use it to fill gaps outside the house. There is no indication what the lowest temperature is during application. The outside temperature range from zero deg. C at night time to 8 deg. c during the day at this time of the year where I live. Can I apply Great Stuff at this time?

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.

the expansion of the material was not what i expected, I tried to fill a 1" gap underneath a bathtub, the foam didnt expand enough to fill the vertical space. also, it ran out much quicker than i had imagined.

Can only use one time. Due to the delivery system design it clogs no matter what you try to do. - Leave product in tube and cut for next use = does not work next time - Take off clear handle/hose and spray clean with brake cleaner and shoot compressed air to really clean out = does not work next time Ends up being a huge waste of money unless you intend to utilize the entire product right when it is first used. The company needs to talk with the can vendor or if Dow is also making the can they need to re-design! Will find alternative products to use.

now I know why it's called great stuff, because it is great

Used numerous times to fill gap/cracks, etc. Just wish that either here on the website in product Specifications or on the cans it would say "Contents estimated to fill X amount (square inches or feet) of a standard 16" O.C. 2 X 4 framed wall.

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.

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?

Great stuff is just what I was looking for. Easy to use and it does the job.

It is a very good product however couple of things, very important. 1) The chemical properties are such that settling time is around 10 mins and longer in colder temperatures. Therefore, Do NOT wear cheap gloves , wear nitrile and thicker gloves. And do not hurry to take the gloves off . Once this product gets to your Skin, you are done for 3 days until new skin arrives. Acetone will work, but it is highly dangerous, and I would not recommend anybody keeping Acetone in their house or handling it without proper knowledge. 2) 50% means 50% , DO NOT completely fill, and I mean, not even 75%. The foam will expand with ratio 1: 3 , that means what you see will multiply or expand times 3 (Three). Just a thumb rule. Follow the instructions , DO NOT hurry. 3) Wear Safety glasses. If you dont chose to wear a safety glass then ask your significant other to keep 911 number handy. Because you need a backup plan if you try hard to get it in your eye, or rub your eye with gloves. 4) Make sure the area is well ventilated.

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.

Sounds easy.....the straw was a pain....my hands are a mess...and I used gloves....How do you remove from hands?

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.

The competitor claimed future uses if strAW WAS CLEANED WITH ACETONE.

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.

i picked up 4 cans,2 ok but 2 leaked around the top,would not come out of the tube.had to throw them in the trash.big waste of money

Tried to cover with aerosol based rubber paint, paint ate through Great Stuff. Good if you're not intending to cover it, but don't recommend if it'll be painted with undercoating/rhinoliner/rubber based paint.

Bought this to fill in space vacated by my elimination of water soaked wood. Product does not stick well on vertical surfaces. It sags and runs. It is also very hard to gauge thickness as product expands unevenly. Since some product didn't stick, it dropped on a good surface and was a mess to clean up. Now I have to cut it out to try and make it even. As far as I'm concerned, its only good for floor type surfaces.

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.

I've used this over the years and it works great when it works but in about 50% of the cans, the foam comes out of the top next to the pivot point rather than out of the plastic nozzle. Very frustrating when the product is within the expiration date. I would not recommend to anyone for use unless your supplier is close to where your working and open when you plan to use the product so you can return the broken cans and get replacements.

I love the Dow foams, this one however doesn't quite live up to the promise of filling large holes and gaps. Most of the foam fell back at me once I sprayed. My recommendation is to add wood or rocks to the hole first to give the foam something to adhere too. I have used the foams in the past for set design, it makes great rocks when sprayed on chicken wire

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.