Permastone?

[MichelleRay]

I recently found some moulding supplies I'd bought a while back. I intended to use them for something else but I was thinking of possibly making some aquarium decor out of it. I was wondering if anyone here had any experience using this stuff in the aquarium? The mould making stuff I got is called Instamold and the actual material for the thing being made is Permastone.

 

[Reefing Madness]