<a href=showthread.php?s=&postid=14781721#post14781721 target=_blank>Originally posted</a> by flyguy1821
I read on a post you can use Gorilla Glue (polyurethane based) instead of epoxy to adhere sand/cc to the foam. Any ideas or opinions on this?
Pillars look awesome by the way!!!
I wouldnt use it... But that is simply because the epoxy resin I used worked so well and was cheap enough that trying to cut cost in such a critical area just wasnt worth it.
The bottom line to "is it safe" comes down to if the product is completly inert after curing. Beyond that, the only other concern would be if it is UV sensitive.
I used a product called MAX ACR, which stands for "Aquarium Construction Resin". It is a low viscosity 2 part expoy resin that is sold in 1 1/2 gallon lots (or more if desired). I used maybe half of it, and I think I paid close to $100 shipped. My biggest concern was that it was fish & invert safe. This stuff is used in large public aquariums
Im not sure if polyurethane is safe, as I have never done any research on it, but I will say that while during my research I did find a bunch of posts where people used fiberglass resin (polyester based) and it seemed like there were a few reports of problems, but perhaps this was related to other issues. I would think that fiberglass resin (polyester based resin) would be safe to use as it has been used to construct many ponds and aquarium ornaments, but I do know that it does take much longer for it to completely cure (up to 30 days).
Also, one thing that I beleive is worth noting is that the MAX ACR 2 part expoy is almost completly oderless! This is a HUGE plus if you are forced to working indoors (such as I was as this project took place during the cold winter months of the mid-west). Fiberglass resin, if you have ever worked on cars or boats, I am sure you will know, is VERY toxic as it vent's.
Hope that helps!
Scott
