Raw Material Suppliers Mold Making Materials. Raw Material Suppliers offers high-quality tin-cured and platinum-cured RTV silicone rubbers and putties, RTV urethane rubbers, and latex rubber for making high-quality flexible molds.. Silicone molds are great for casting urethane plastic and rubber, polyester casting resin, plaster, concrete, epoxy, soap, wax and some low …
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