Specially formulated metal casting plaster that incorporates an air-entraining agent. Used for the precision casting of non-ferrous metals and alloys.

Hydroperm® Metal Casting Plaster is a specialized plaster used for fabricating permeable plaster molds. Hydroperm® Metal Casting Plaster dries with a porous structure of small, uniform, interconnected cells just beneath its surface, offering channels through which steam or other mold gases can escape during the metal-casting operation.

Features

• Formulated with HydrocalL® gypsum cement
• Offers a smooth mold surface, carvability and controlled permeability
• Ideal for non-ferrous castings
• Sets 12-19 minutes after mixing
• Requires 100 parts water by weight per 100 parts plaster

50 lb bag