This site offers all kinds of casting materials including algenate and wonderful materials to then cast the item including laytes/foams/rubbers. The benefit of algenate is that you can mix it with warm water and sticking a dick into warm and wet....well.....
I've never used silicon to mold body pieces but have used algenate. Silicons tend to release heat when the curing process takes place and some of them get very hot.
Good Luck
afmvdp -> RE: Plaster mold (2/27/2005 8:22:12 AM)
damnit, I actually found the best material to make this type of thing out of but I lost my chemicals book in the move. Once I find it again, I'll post it. But it is an amazingly smooth material once hardened, like plastic glass, and easilly cleaned as well.
Make the mold out of a nice GE silicone and then just pout the liquid into the mold and you have a perfect replica.