I have compared this product to two part Silicon mould material and two part polyurethane mould material also available on the market, and I can say that Amazing Mould putty is extremely simple to use, very effective and the resulting moulds are very durable, and suitable for casting plaster, resin or even baking sculpey in the oven, inside the moulds. Buy a smaller sample of the Putty to test it out yourself, before investing in the larger 3lb tub.