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Hydrocal White Gypsum Cement

USG Hydrocal® is a multi purpose gypsum cement that offers twice the compressive strength of regular plaster. Is more porous than Ultracal 30.

  • Ideal for both solid and hollow castings
  • Offers long workability; setting expansion twice that of molding plaster and pottery plaster
  • Has a great value to performance ratio
  • Achieves a stark, white color, making it ideal for accepting colorants
  • Sets 25-35 minutes after machine mixing
  • Requires 45 parts water by weight per 100 parts plaster.


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