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U.S. exports of plasters of calcined gypsum or calcium sulfate (HS 252020) totaled $3.1M in July 2026.
Importers of Plasters of Calcined Gypsum or Calcium Sulfate paid $60K in duties in July 2026 — an effective duty rate of 22% on $268K in dutiable value, based on actual customs collections rather than the published tariff schedule. Plasters of Calcined Gypsum or Calcium Sulfate imports of $289K in July 2026 ran 53% below the year-to-date monthly average of $619K.
Last updated: July 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.
25 shipments/mo
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.
HSChapter 25
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Subheading 2 of 2 in heading 2520
Subheading 252020 · $289K of $13.3M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2520200000 | Plasters Constng of Calcnd Gypsum or Calcm Sulfate | $353K | 8.69% | 84.93% | $31K |
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 | $3.8M |
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.
ImportsExports
Imports
$289KYoY · Pro
Exports
$3.1MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Canada and Mexico together take 74% of it.
customs district
origin
entry
rate provision · imports
7.3% enters free of duty; the effective duty rate is 20.80%.