A general purpose plaster suitable for architectural, art, and support shell (mother mold) applications. Often referred to as "Plaster of Paris" or soft plaster. Used for waste molds or temporary patterns where surface hardness and strength are not important. Screeds well under a template but is not as hard or strong a
A general purpose plaster suitable for architectural, art, and support shell (mother mold) applications. Often referred to as Plaster of Paris or soft plaster. Used for waste molds or temporary patterns where surface hardness and strength are not important. Screeds well under a template but is not as hard or strong as HYDROCAL cement.USG Material Calculator
PropertiesTechnical Properties
Mix Ratio by Weight
70 parts water : 100 parts powder
Cure Time
(hand mixed) 27-37 min
Compressive Strength
2,000 psi
Technical Properties: Maximum Setting Expansion 0.200%Density Wet 99.0 lb/ft3Density Dry 69.0 lb/ft3Media
USG PLASTER AND GYPSUM CEMENTS MIXING PROCEDURE
Documentation
Technical Bulletin
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