... and expansion, silicon flexible molds are used for mold duplication and delicate mold making for poly crafts, resin crafts lighting and candle ... rubber mold making silicone rubber is primarily intended for: a. poly resin crafts, PU crafts, PU resin crafts ,gypsum crafts ... take the proper silicone rubber to make the mold for suitable products. for products with delicate and complicated patterns, you ...