Glass stuffed epoxy laminating paste is a simple and reliable way to reinforce epoxy composite moulds. Ordinary gelcoat formulated for use with polyester resins and vinylester resins doesn't adhere to epoxy surfaces, though epoxy adheres extremely nicely if placed on polyester resin surfaces. Epoxidized vegetable oils are fashioned by epoxidation https://www.propanraya.com/id/produk/epoxy-fast-dry