Loading...
U.S. imports of aluminous cement (high-alumina cement) (HS 252330) totaled $2.5M in July 2026, traded with 14 countries.
Importers of Aluminous Cement (High-Alumina Cement) paid $186K in duties in July 2026 — an effective duty rate of 11% on $1.7M in dutiable value, based on actual customs collections rather than the published tariff schedule. Aluminous Cement (High-Alumina Cement) imports of $2.5M in July 2026 ran 48% below the year-to-date monthly average of $4.8M.
Last updated: July 2026 dataAluminous cement — also called high-alumina cement or calcium aluminate cement — is engineered for extreme-temperature and chemically aggressive environments, serving refractory castables, kiln linings, sewage infrastructure, and rapid-setting repair applications where Portland cement would fail. France is the leading US import source, reflecting the global dominance of French producers in this specialty segment, with Poland and Croatia also supplying the market. Classified under tariff line 2523300000, this product commands a significant price premium over Portland cement and is typically sold to industrial rather than general construction buyers.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
116 shipments/mo
Aluminous cement is manufactured from bauxite and limestone rather than the iron-bearing raw materials used for Portland cement, resulting in a high alumina (Al₂O₃) content — typically above 35%. This composition gives it exceptional heat resistance and rapid strength gain. For classification, the key is confirming the alumina content and production route; a product that does not meet the aluminous cement composition threshold would fall under the hydraulic cements NESOI heading (2523900000) instead.
ASTM C1600 covers ultra-high-early-strength hydraulic cement, but most aluminous cement for refractory use is specified to EN 14647 (calcium aluminate cement) or proprietary producer standards. Importers supplying refractory or industrial end users should obtain technical data sheets confirming alumina class (CA-25, CA-40, CA-50, CA-70, CA-80) to match the application requirement.
HSChapter 25
Supplier Network
Get discovered by U.S. importers searching for HS 252330 — Aluminous Cement (High-Alumina Cement). Be the first supplier listed.
Subheading 4 of 5 in heading 2523
Subheading 252330 · $2.5M of $184.6M
ImportsExports
Imports
$2.5MYoY · Pro
Exports
$1.8MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
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 |
|---|---|---|---|---|---|
| 2523300000 | Aluminous Cement | $8.1M | 9.37% | 93.52% | $757K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2523300000 | Aluminous Cement | $1.6M |
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.
Imports · July 2026
origin
Poland and Canada together supply 65% of it.
customs district
destination
entry
rate provision · imports
30.8% enters free of duty; the effective duty rate is 7.35%.