U.S. exports of Plasters of Calcined Gypsum or Calcium Sulfate (HS 252020) totaled $4.7M in August 2026.
Importers of Plasters of Calcined Gypsum or Calcium Sulfate paid $57K in duties in August 2026, an average duty rate of 13.82% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Plasters of Calcined Gypsum or Calcium Sulfate imports of $410K in August 2026 ran 31% below the year-to-date monthly average of $593K.
Last updated: August 2026 dataCalcined gypsum plasters — produced by heating natural gypsum to drive off water and create hemihydrate or anhydrous calcium sulfate — are construction finishing materials classified under tariff line 2520200000. Mexico leads US import supply, followed by Egypt and Turkey, reflecting those countries' significant gypsum processing industries. Unlike raw gypsum, these plasters have undergone a defined thermal treatment that makes them ready for direct use in wall finishing, molding, and dental or industrial casting applications. The degree of calcination (alpha versus beta hemihydrate) affects strength and setting time, which are key commercial specifications.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
38 import shipments a month
The distinction is thermal processing: raw gypsum and anhydrite (2520100000) are natural minerals in their geological state. Plasters under 2520200000 have been calcined — heated to partially or fully dehydrate the calcium sulfate — making them reactive binders that set when mixed with water. The presence of calcination, confirmed by a certificate of analysis showing loss on ignition or hemihydrate content, is the classification trigger.
While calcined gypsum plasters are not subject to mandatory admissibility review by a specific regulatory agency for general construction use, importers should ensure commercial invoices clearly state the product's chemical form (hemihydrate or anhydrite), intended end use, and country of origin. Products marketed for dental or medical casting applications may attract additional scrutiny from FDA. A licensed customs broker can advise on any applicable marking requirements.
Subheading 1 of 2 in heading 2520
Subheading 252020 · $4.7M of $6.8M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2520200000 | Plasters Constng of Calcnd Gypsum or Calcm Sulfate | $410K | 13.82% | 88.29% | $57K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2520200000 | Plasters Constng of Calcnd Gypsum or Calcm Sulfate | $4.7M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
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ImportsExports
Imports
$410KYoY · free account
Exports
$4.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $8.3M of Plasters of Calcined Gypsum or Calcium Sulfate and exported $42.8M.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
Canada and Japan together take 59% of it.
customs district
origin
entry
rate provision · imports
11.7% enters free of duty; duty collected equals 13.82% of imports for consumption.