Can you mix Plaster of Paris powder with Liquid Rubber?

Will it make a rubbery but firm sort of mould? At what ratio should you mix?Can you mix Plaster of Paris powder with Liquid Rubber?
That would be like trying to mix chewing gum and pebbles- they won't mix but will just make a lumpy mess.


The liquid rubber will make a rubbery but firm mould, you just need to build it up to a thickness that works. If you want to keep it thin, then make the rubber mold then make a 2 or 3 part plaster mold over it that will hold the rubber stable while the modeling filling hardens.Can you mix Plaster of Paris powder with Liquid Rubber?
No, it will make a mess. If you want to add something to latex molding compound it needs to be neutral, like silica flour (which has its own risks) or glass fiber flocking. But liquid latex does a bad job of drying if thick, so it is normally painted on in layers. Because it is flexible, it is normally backed with a plaster layer to provide support.