Mold Max 27T Silicone Mold Making Rubber - Trial Unit Shore 27A Tin Silicone Rubber Less costly alternative for creating animatronic skin effects Good for making molds used for casting plaster and wax. Can be thickened with Thi-Vex thickener for brush-on application and effects. An infinite number of color effects can be achieved by adding Silc Pig silicone pigments or Cast Magic effects powders.