Any substitute for Smooth-Cast 300? Answered
We have our own homegrown substitute for Oomoo thanks to the local boy genius Mikey77
But is there any substitute for it's companion product, the very expensive ($100/gallon), two part liquid plastic stuff called "Smooth-Cast 300"?
Does anyone know of a way to mix an inexpensive something up and pour it into a mold and have it harden up into a strong thing? It doesn't have to be as invincible as Smooth-cast, but .. is plaster the only option?
Update: What am I casting? I found a really great ornamental tile at Habitat for Humanity and want to make copies of it
Update: I'm wondering now, what if I used something from the wall/flooring department, like Mastic? Its about $34 for two or three gallons. It fills gaps and hardens to such a degree that it can't be chiselled easily. I may try this.
Update: Tried mastic, it works but takes far too long to dry, on the order of three days or longer... Maybe if I mixed in some corn starch (ala oogoo?)