Which type of "GREAT STUFF" foam do I use for making a frog vivarium background?

[BettaShawn]

I heard it was GREAT STUFF- Gaps and Cracks, but I am unsure now because others say "Windows and Doors", others say "Pond and rocks", and I'm just confused as to which type I should be using to make a frog vivarium background.

[helm96]

I use the gaps and cracks. It does have a yellow color to it so I use Brown silicone to cover it to help hide the yellow. If I am right others use the Pond and Rocks because it has a black color so it is easier to hide when finishing the background.

[DonLisk]

I use the GS gap and crack filler and sometimes the BIG Gap and Crack filler.
The Tetra Waterfall Foam is also nice since its black but 3 times the price.

Keep in mind when putting the foam in that it expands 30 to 50 percent larger than what was sprayed in. If your going to sculpt it let it really dry for a fw days.
If you have places that explode with a large amount from underneath, let it go and just pull that off once it drys. If you mess with it you'll have a mess.

[NatureLady]

I attempted to find the GS pond and stone and couldn't get any local. Shipping was outrageous!

[J Teezy]

the type refers to how much it expands if i'm correct. Gaps and cracks is the least expanding of the GS versions

[J Teezy]

i found the black pond version of the GS at Menards today. They also have the gaps and cracks on sale for 2 for $5.00 right now