Mould casting

[ShadowCory]

I've made some silicone push molds for polymer clay sculptures using this method:
https://www.youtube.com/watch?v=ZcDLVE7Strc
It is really cheap, and gives very good reproduction once you get the hang of it. I have made multipart molds using clay dams and keying with the end of a cylindrical tool. Something like the non business end of an x acto knife works great.