Latex can't be used for two part molds due to shrinkage and the fact that it isn't heat resistent. I make a lot of molds, usually for my work, that I use for plaster or resin casting. I do have heat resistent silicone and used it to make a Star Wars stormtrooper mold. I'll get a pic of it as soon as I can. Never got around to cast it
Making a figure mold for a simple figure that requires two parts isn't hard.
- Use Lego bricks as a mould box; they won't leak and are very flexible to use.
- Use any oil based non hardening clay to cover half of the figure (use the factory mold lines as a guide)
- Pour the 2 part silicone.
- Turn the mold, remove the clay and cover the half of the mold with a release agent (silicone spray or wax.)
- Pour the second half of the mold.
- Cut all pouring/airing cannels afterwards with a sharp hobbyknife.
This is how I do it and how it's done most of the time for small hobby projects. Before I heard of the legos i always used to make wooden crates and sorts but the Legos really make it easy. Pouring a mold in a boxlike construction with enough 'body' around the subject makes that you won't need a supporting mold. They are just like the Dutkins molds really.
Hope any of this helps.