Exceptionally strong gypsum cement is a multi-purpose product used as a high strength alternative to sulfur capping compound. Superior expansion vs. Hydrocal® A-11 or B-11 gypsum cements. Hydro-Stone® Gypsum Cement is especially suitable where high strength and resistance to water absorption are necessary. Features: •Meets ASTM C617 •High absorption resistance •Sets in 17-20 minutes, after machine mixing •Requires 32 parts water by weight per 100 parts plaster. •Can duplicate extremely fine details •Is self-leveling, with low viscosity •Provides fast set time •Compressive Strength, One Hour After Set 4000 psi (27.6 MPa) •Compressive Strength, Dry 10,000 psi (68.9 MPa) •50lb. bag NOTE — For best storage results, keep indoors in a dry, stable environment, away from drafts. Do not stack more than two pallets high.
