As you can see in the above photo, the PC as shrunk away from the PC mold, no release agent used, just plain ole Shrinkage.
The PC stone lifted right out of the PC mold because it had shrunk. You can also see where the mold has been repaired, I broke it trying to remove the original stone I made a copy of because the PC Mold shrunk to the stone so tight I could not remove it without breaking the mold, but it was simple to repair.
If you papercrete casting has no undercuts or if you are going to use a rubber type mold you will not need a release agent.
BTB
--- In papercreters@yahoogroups.com, "bfenti" <bfenti@...> wrote:
>
> Thinking of large form papercrete casting and wonder what would work as an inexpensive mold release agent?
>
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