Silicone 2 components, 500+25grs, rubber is a silicone elastomer that, after adding the catalyst in the proper proportion and allowing its crosslinking for 24 hours, becomes a flexible and elastic material at room temperature. Formulation based on polyisoprene. Confection of molds for reproduction by casting with different materials (various resins, wax, plaster). High tear strength. Its remarkable flexibility facilitates demoulding. odorless catalyst.Mix the 5% hardener (25grs) special for the 500grs of silicone. Average hardening time 10h.