I was having a root canal earlier in the week and needed an impression made, the 'goo' used in the mold took 90 seconds to set and made me think it would be a great medium for mounting frags. Dries in wet environment, non toxic (I hope) and workable long enough to mount a frag. I looked it up and found this: http://www.practicon.com/item/vaccu-sil-heavy-body-impression-material/7090117?src=1000069&gclid=CMiA1biiucsCFdgHgQod5XkCaA Just need the 'gun' to mix the two parts and off you go. Questions: -Reef safe? -leach phosphates? -etc Any professionals out there have any input?