Great Stuff/Handi Foam rocks?

[Glass_]

Would this work as a substrate?

crud, well i decided to change the topic of the thread entirely, but it looks like the title didn't change. so now i have a completely unrelated title for this thread. whoops.
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Hi, I'm new to this site and I was reading how actual sand is harmful to leopard geckos, and other things like paper towel and newspaper don't look natural, and was thinking of ways to get a natural thing without the risk of them eating it, and thought of an idea. How about if I got something like cardboard, and covered the top of it with glue or silicone, and then poured sand on it and when it's dry pour off the excess sand? Just an idea. Thanks for reading.

 

[LadyKaotix]

ceramic tiles

i think it would be difficult in terms of cleaning. im sure it would look great, but u wouldnt be able to really clean it properly. i wanted a natural look too. i went to lowes and bought natural looking ceramic tiles. they are uneven and are multi colored and everything! it looks great in the tank, has a slightly textured surface, but is easy to take out and wash, and disinfect. good luck!!