Silicone Polyurethane Rubbers

Silicone rubbers are two-component systems (base plus curative; A+B) available in a hardness range of very soft to medium. Silicones can be cured with either a platinum catalyst (addition cure) or a tin catalyst (condensation cure). They are available for making molds that are poured, brushed or sprayed on to a model and have performance characteristics that no other mold rubber has.