Used as capping compound, USG Hydrocal Brand White Gypsum Cement is a good multi-purpose product for people looking to upgrade from a standard plaster product to one that has a higher degree of hardness and impact resistance. Offering twice the compressive strength of plaster, Hydrocal® White Gypsum Cement is especially suitable in thin, delicate sections where high green strength is required. •Meets ASTM C617 •Offers long workability; setting expansion twice that of molding plaster and pottery plaster •Has a great value to performance ratio •Sets 25-35 minutes after machine mixing •Requires 45 parts water by weight per 100 parts plaster. •Compressive Strength, One Hour After Set 3000 psi (20.7 MPa) •Compressive Strength, Dry 6000 psi (41.4 MPa) •50lb. bag
