Gorilla Heavy Duty Expanding Foam 353ml - Multi-Purpose, Durable & Seals out Air, Moisture & Pests | No Shrinkage & Maximum Seal | For Indoor & Outdoor* Use

It expands to a tremendous degre, so if you have a lot to do I'd advise doing a bit at a time and build up. Otherwise you'll waste an awful lot when you cut off the surplus. Very good for filling external holes in walls that might attract vermin.

Very good although a tad messy- I’d advise using a pallet knife for a tidy finish.

Very effective and does an amazing job

Loath though I am to use products like this, there are times when nothing else will really work. I used this in cold, slightly wet conditions to block a hole in a wastewater drain from an old wastewater pipe, where the waste water was backing up into my walls. Despite the grubbiness of the hole and the cold and wet conditions, it worked like a dream, and I was able to cut off the excess after only a couple of hours. I've tested the seal by flooding the drain, and it's no longer backing up, so worth every penny! Recommended.

Very efficient

If you don't use it all in 1 go, you can't use it again, [1 use only] which is ashame as we had quite a lot left in the can. Saying that, the gorilla foam is excellent sets within 24hrs & is as hard as concrete. Its easy to sand smooth but, I would advise a face mask so you don't inhale the dust.

Nozzle is very ineffective and doesn’t stay in place making the whole process very messy. Have used expanding foam in the past without any problems. Having said that, the foam that I did manage to squirt in the gap has set and done the job. Just need to trim excess blobs.

I had a accident with van and as it was my fault I was looking for a quick fix , this stuff is great it filled hole and has been solid ever since it does need sanded to look apathetic but it ha stone the job