Moulding
Flexible Molding
When you want to make a hard casting such as gypsum or urethane plastic it is best to make a flexible mold. Here are some options:
Hard molds are used as support molds for flexible molds (mother molds). Sometimes only a rigid (hard) mold is used. Also an integrated combiation of a flexible and a rigid material is possible and can work vey well in some circumstances. (e.g. a hard shell of Plasti-Paste with a flexible liner of Brush-On 35 Polyurethane rubber). For the casting of flexible materials as an end product also rigid molds are generally preferred.
ready made molds
Molds that are ready to use; cast them with gelatin, plastic, rubber or even silicone.