Kraken Bond Black Spray Waterfall Foam Sealant - (2x24oz) Expanding Polyurethane Pond Foam Sealer Black, UV Resistant Insulating Spray for Landscape & Exterior, Gun Use, Gun Not Included, 2 Pack

Works well and fast. I thought that it would expand more than it did. It did complete my job once I bought another can. Also very glad that I bought the sealant cleaner to clean off the gun. Worked incredibly well at removing the foam.

We’ve purchased quite a few of these, making backgrounds for various reptiles and amphibians. It does exactly what it says it’ll do, and so far it’s holding up really well. About our only complaint is it doesn’t cover very much because it is low expanding, but honestly, it says that in the description so….

Overall quality is good. It bonds to rock exceptionally well, but not that great to rubber. I used two full cans on my water fall, and it still leaks. It's probably my inexperience with the product but you'd figure that blasting a crap ton of foam under a rock it would seal it. All in all I'm satisfied with it and will probably order it again. A high quality gun is helpful.

This is the best foam for building 3D backgrounds for reptiles, fish, invertebrates.

Will not work with other foam guns!

I liked the foam color, it is better than no color or orange when being exposed like in ponds etc.

The nozzle on these cans stick out further than the cans I have always used(Great Stuff) which meant trying to screw the can onto my gun lead to a huge mess. The foam was dispensing before the threads on the gun would engage. I’m using one of the many cheaper guns that Amazon sells in 3 packs, so it’s slightly possible a different gun might have deeper threads. But being there’s only a few threads to grab onto, I highly doubt a different gun would be designed differently. The resulting mess left me throwing away my gun and the full can of foam. I didn’t have any foam gun cleaner handy to spray down all the messy foam, so I’m sure it would be too late to clean it later once it cures. Aggravating, and also beyond my window to return the other can. So I’m out a gun and two cans of foam, and a setback on the job I’m trying to do. My included pic is of my third attempt to screw the can on, after grabbing rags trying to wipe off the excess foam.

Expensive but worth it