Dave,
I found the paragraph, and it says fully cured Sculpy doesn't need to be sealed.
I guess my next question is will I need a release agent?
I plan to make an RTV mold of a swimbait with fins, a thumper tail, and a hook slot.
I am going to use Alumilite 3 RTV.
I made a mold of a similar, only larger, soft plastic swimbait, and it came out fine, with no release agent.
But this master is hard, so I'm wondering if I need a release agent on it, and what to use as a release agent. Spray PAM is my default release agent for my POP molds, but I don't want to use anything that will interfer with the RTV curing correctly.
Mark