Lord Dragon wrote:
i was at hobby lobby the other day and saw this product
http://shop.hobbylobby.co.../high-strength-3-181719/  i saw that it has gotten some good reviews just didn't know how it would work to reproduce some simple tiles from hirst arts.  has anybody tried this product before

It's "OK".

It creates a pretty firm mold (noticeably harder than the stuff Bruce uses) and basically while it will generally work for a simple brick mold, the mold it creates may not hold up for more than a few dozen castings before the detail starts to fade due to the gradual wearing of the silicone in small detail areas of the mold.

I personally would ~not~ use it for molds of assembled pieces with significant undercuts.