Gold Star Powders' mould rubbers contain a high concentration of natural rubber. They are capable of reproducing the finest detail. High elasticity allows the mould to separate cleanly from the metal master pattern and its plastic memory allows the mould to regain its exact shape.

The mould rubbers are soft and flexible, allowing the wax patterns to be easily stripped from the mould, increasing productivity. This flexibility enables difficult moulds to be made with heavy undercuts when stiffer rubbers would break the wax pattern. Moulds made from Gold Star Powders' rubber will last many years, retaining their elasticity and memory.