Hydro-Stone® Gypsum Cement

Exceptionally strong gypsum cement designed for stretch-press dies and producing cope-and-drag equipment.

Key Documents & Design Files

Overview

Exceptionally strong gypsum cement designed for stretch-press dies and producing cope-and-drag equipment.* Produces high-quality, indoor novelty and statuary castings that require extremely hard surfaces and superior reproduction of fine detail. Superior expansion vs. Hydrocal® A-11 or B-11 gypsum cements.
*High water absorption resistance.

Main Features

Hydro-Stone® Gypsum Cement is especially suitable where high strength and resistance to water absorption are necessary. It is ideal for applications in both the tooling & prototyping and art & statuary categories.

Hydro-Stone® Gypsum Cement — For Tooling & Prototyping
Hydro-Stone® Gypsum Cement is ideal for stretch-press dies where extreme surface hardness is required. Offering greater expansion than Hydrocal® A-11 or B-11 gypsum cements, Hydro-Stone® Gypsum Cement:
  • Features a heavy, syrupy consistency, ideal for pouring into solid models or patterns (and making it ideal for filling multiple molds simultaneously)
  • Adapts to most flexible moulding compounds, due to its high absorption resistance
  • Sets in 17-20 minutes, after machine mixing
  • Requires 32 parts water by weight per 100 parts plaster.
NOTE — For best storage results, keep indoors in a dry, stable environment, away from drafts. Do not stack more than two pallets high.

Hydro-Stone® Gypsum Cement — For Art & Statuary
One of the hardest and strongest Hydrocal® products, Hydro-Stone® Gypsum Cement is used in the fabrication of high-quality art novelty and statuary castings. Offering excellent paintability, Hydro-Stone® Gypsum Cement:
  • Can duplicate extremely fine details
  • Works well in plaster and most flexible moulding compounds
  • Is self-leveling, with low viscosity
  • Provides fast set time for quick mold turns

Documents & Files

Submittal Sheets & Specifications

Submittal Sheet (English) PDF 233.4 KB

Catalogs & Brochures

Brochure (English) PDF 613.4 KB

Installation & Technical Manuals

Installation Guide (English) PDF 377.4 KB

SDS, Certifications & Reports

SDS (English) PDF 92.6 KB
SDS (Spanish) PDF 94.3 KB

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Our customer support team will get back to you within 48 hours

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)
  • All questions and answers follow USG’s Terms & Conditions.
  • Your question and USG’s answer may be posted to this page in the future, but none of your personal info will be included.

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.

  • Be the first to as a question

    Let us do the research and get back to you (usually within 48 hours).

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  • Need help right away?

    Call our technical support team at 800.USG.4YOU (874.4968)

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