ComposiMold Impressive Re-Usable Putty 6oz Make your own molds and casting for wax, soap, clay, polymer clay, resins, low melt metals, urethanes, and more. Easiest mold making material yet, Even make molds on ceilings and walls, no mold box necessary Starts as a rubber that is softened in the microwave in seconds One part molding material that can be used, and re-used for dozens of custom molds The 6 oz. ImPRESSive Putty can cover 26 square inches (168 square centimeters) or a cube with 2 inch sides.