Calcined Gypsum Plaster
Calcined gypsum plaster, commonly known as plaster of Paris, is produced by heating gypsum to drive off water, yielding a fine powder that sets when mixed with water. It falls under tariff item 2520.20.00 as a plaster consisting of calcined gypsum, with no processing beyond calcination.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the product is uncalcined gypsum or anhydrite
Uncalcined gypsum or anhydrite falls under a different heading in the same subheading.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the plaster is not mixed with additives beyond small quantities of accelerators or retarders, as per the tariff item
• Declare the correct unit of measure (tonnes or kilograms) based on dry weight, excluding any moisture
• Keep supplier documentation showing the calcination process to support classification
Related Products under Tariff item 2520.20.00
Colored Modeling Plaster
Colored modeling plaster is calcined gypsum with added pigments, used for sculpting, casting, and crafts. The pigments are considered coloring only, and the product remains a plaster under tariff item 2520.20.00, as it is not processed beyond calcination and coloring.
Dental Plaster Type III
Dental plaster Type III is a high-strength calcined gypsum formulation with controlled accelerators for dental models and casts. It qualifies under tariff item 2520.20.00 as a plaster consisting of calcined gypsum, with small quantities of accelerators permitted by the item's description.
High-Strength Gypsum Plaster
High-strength gypsum plaster is made from specially calcined gypsum with accelerators to achieve superior compressive strength for precision tooling and patterns. It remains a plaster under tariff item 2520.20.00, as the processing is limited to calcination and the addition of small quantities of accelerators.
Plaster of Paris Powder
Plaster of Paris powder is the classic beta-hemihydrate calcined gypsum used for casts, molds, and sculptures. It falls directly under tariff item 2520.20.00 as a plaster consisting of calcined gypsum, with no added accelerators or retarders beyond trace amounts.
Setting-Type Joint Compound Base
Setting-type joint compound base is calcined gypsum plaster used as the primary ingredient in drywall finishing compounds. When imported as bulk powder before mixing with fillers and polymers, it falls under tariff item 2520.20.00 as a plaster, provided it is not yet a prepared compound.
White Architectural Plaster
White architectural plaster is a calcined gypsum product designed for interior wall finishing and decorative molding. It qualifies under tariff item 2520.20.00 as a plaster consisting of calcined gypsum, with minimal additives and no processing beyond calcination and coloring.