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Hydroperm® Metal Casting Plaster

Specialized plaster used for fabricating permeable plaster molds.



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

Main Features

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. Hydroperm® Metal Casting Plaster:

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

Documents & Files

Data Sheets & Specifications

Data/Submittal Sheet (English)

Catalogs & Brochures

System Catalog (English) PDF 18.5 MB

Installation & Technical Manuals

Technical Guide (English) PDF 83.5 KB
Installation Guide (English)

SDS, Certifications & Reports

SDS (English) PDF 56.0 KB
Certificates (English) PDF 150.7 KB

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Question Guidlines

  • Questions should relate to this product specifically.
  • For help with pricing, availability, or delivery, please call 800.874.4968 (Monday–Friday, 7am–6pm Central)
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q & a

  • Can I color/tint plaster casts?

    Yes. For uniform coloring, colorants can be added to the mix water and should be blended thoroughly. For varied color effects, colorants can be added to the slurry.

    Both mineral colorants and water dispersed colorants are compatible with our plaster products.

  • Have a question?

    Let us do the research. We'll get back to you as quickly as we can.

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  • Need help right away?

    Call our Technical Support team at 800-874-4968 (Monday-Friday, 7:30 am - 4 pm Central).