HOBBY-CAST GREEN 4 CAVITY BOTTLE STOPPER SILICONE CASTING MOLD LIQUID DIAMONDS HOBBY-CAST 4 CAVITY BOTTLE STOPPER CASTING MOLD If you have ever wanted to cast your own bottle stoppers and didn't know where to start then this is the place to come. This 4 cavity bottle stopper mold is made of high grade silicone. It is compatible with all kinds of resins. Epoxy Resins Polyester Resins (PR) Alumilite, Liquid Diamonds, Hobby-Cast casting resins This mold does not require mold release to be able to demold the stoppers however it is advised to use mold release simply to lengthen the life of your mold. Blue molds are recommended for Epoxy, Polyester, and Alumilite resins. This silicone mold casts bottle stopper size: 1-13/32" diameter, 2-1/2" deep holds approximately 80 grams per cavity