Hi Patty,
In the USA, there is a product called Hydrostone that could be very similar to the Rockoflex. It is used in a similar fashion in Zoo exhibits. I tried to track down the make-up of Rockoflex (as I have a 90 gallon cube front opening tank I would like to sculpt up) to see what it actually constitutes it but was unable to find an ingredient list.
I would like to see if there is an USA version of the epoxy they use.
Ed


