USG Plaster & Gypsum Cement
Shop professional USG plaster and gypsum cement for casting, sculpture, pottery, ceramic mold making, precision tooling, prototyping and special effects. Choosing the right gypsum starts with the application: use No. 1 Moulding Plaster for economical general mold work, No. 1 Pottery Plaster for absorbent ceramic slip-casting molds, Hydrocal White for strong general-purpose casting, Hydro-Stone for exceptionally hard finished art and statuary castings, and Ultracal 30 for low-expansion precision molds and tooling.
Choose the Right USG Plaster
| Product | Best For | Positioning |
|---|---|---|
| USG No. 1 Moulding Plaster | General mold making, waste molds, temporary patterns, sculpting and economical casting. | General-purpose plaster / plaster of Paris. |
| USG No. 1 Pottery Plaster | Pottery, ceramic slip-casting molds, jiggering and plaster studio molds. | Absorbent ceramic mold plaster. |
| USG Hydrocal White | Models, figurines, decorative pieces, solid and hollow casting and detailed artistic work. | Strong general-purpose casting gypsum. |
| USG Hydro-Stone | Art, statuary, architectural details and finished castings requiring high strength and hard surfaces. | Premium high-strength finished casting gypsum. |
| USG Ultracal 30 | Precision molds, case molds, tooling, patterns, prototyping, SFX and resin tooling. | Low-expansion precision tooling gypsum. |
Casting Plaster for Art, Sculpture & Decorative Casting
When a gypsum casting needs to hold fine detail, accept paint cleanly and stand up to handling, ordinary moulding plaster is often not enough. USG Hydrocal White is the versatile all-purpose casting gypsum for solid and hollow casting, figurines, models and decorative pieces — offering substantially greater strength than traditional plaster of Paris while remaining easy to work with. For finished castings that demand the hardest, most durable surface — art, statuary, architectural details and sculpture casting — USG Hydro-Stone is the premium choice. Its exceptional hardness and fine-detail reproduction make it the preferred statuary plaster and art casting gypsum for professional makers and studios.
Pottery & Ceramic Mold Plaster
USG No. 1 Pottery Plaster is engineered specifically for absorbent ceramic working molds rather than as a finished casting material. Potters and ceramic studios rely on it for slip casting, jiggering, production molds and plaster bats, where controlled water absorption and long mold life are the priorities. It is the industry standard for sanitaryware and dinnerware casting and the correct choice for pottery mold making. For finished decorative gypsum objects, compare Hydrocal White or Hydro-Stone instead.
Precision Mold Making, SFX & Tooling
USG Ultracal 30 is the professional tooling gypsum for applications where dimensional accuracy is the primary requirement. Its low expansion and exceptional surface hardness make it the right mould making plaster for precision molds, case molds, patterns, prototypes and demanding SFX mold applications. It is also widely used for splash-casting molds and models for phenolic, polyester and epoxy resins. When the mold or tool is the critical component — not the finished casting — Ultracal 30 Canada is the standard choice for fabricators, SFX technicians and tooling professionals.
General Mold Making & Plaster of Paris
USG No. 1 Moulding Plaster is the economical traditional choice for general mold making, waste molds, temporary patterns and everyday plaster work. Often described as a professional plaster of Paris, its fine grain reproduces detail well in applications where extreme hardness or dimensional precision is not required. It is a practical molding plaster for sculptors, educators, prop makers and general casting work. When the project calls for greater strength or a harder finished surface, step up to Hydrocal White or Hydro-Stone.
