Reynolds Advanced Materials carries a wide variety of USG Gypsum products. This selection of gypsum plasters is suitable for a number of mold making and casting applications ranging from giftware and sculpture casting, to industrial and production applications.  No. 1 Casting Plaster
The industry standard for figurines, plaques, and lamp bases. Special additives maintain smooth-working qualities and upon drying, result in a hard working surface with reduced paint absorption and degree of chip-resistance.
No. 1 Pottery Plaster
USG No. 1 Pottery Plaster is noted for outstanding performance and long life. The standard of the industry, it is the best material available for sanitary-ware and dinnerware slip casting. Hydro-Stone® Gypsum
HYDRO-STONE® is recommended for producing high-quality novelty and statuary castings requiring extremely hard surfaces. This product is self-leveling when poured and not suitable for hollow cast applications. Snowwhite Filler Gypsum
Its bright white color, softness, and good acid resistance provides a superior medium as a functional filler in polymers, caulks, and adhesives. Its whiteness, softness, acid resistance and binder carrying ability makes it a good candidate for use in adhesives and caulks. Hydrocal® FGR-95 Gypsum
Hydrocal® FGR-95 Gypsum Cement is specially formulated to set fast, develop high strength, and permit fabrication of strong, resilient glass-reinforced products. The superior fire retardant properties allow for safe, code-compliant installation in all types of public and private structures. Hydrocal® White Gypsum
A good general use product recommended for solid and hollow casting of lamp bases and figurines. Designed for thin sections which require high green strength to minimize breakage. UltraCal® 30 Gypsum
A super-strength gypsum cement that has the lowest expansion of any rapid-setting gypsum cement available. Ideal for splash-casting molds and models for phenolic, polyester and epoxy resins. No. 1 Molding Gypsum
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. Technical Specifications | Product Name | Use Consistency (parts of water by weight per 100 parts plaster) | Set Time | Density Wet
(lbs./ft3) | Density Dry
(lbs./ft3) | 1 Hour Compressive Strength | Dry Compressive Strength | Maximum Setting Expansion | | Hydrocal® White | 45 | 25-35 min. | 110.6 | 90 | 1,000 psi | 5,000 psi | 0.39% | | Hydrocal® FGR-95 | 30-36 cc | N/A | N/A | N/A | N/A | N/A | N/A | | No. 1 Pottery Plaster | 70 | 14-24 min. | 99 | 69 | 1,000 psi | 2,400 psi | 0.21% | | No. 1 Casting Plaster | 65 | 27-37 min. | 100 | 72.5 | 1,200 psi | 2,400 psi | 0.21% | | Hydro-Stone® | 32 | 17-20 min. | 119.4 | 108.7 | 4,000 psi | 10,000 psi | 0.24% | | UltraCal® 30 | 38 | 17-20 min. | 115 | 99 | 4,000 psi | 6,000 psi | 0.24% | | Related Photo Galleries
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