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HSChapter 25
U.S. imports of hydraulic lime (HS 252230) totaled $34K in April 2026, traded with 4 countries.
Hydraulic Lime imports of $34K in April 2026 ran 10% below the year-to-date monthly average of $38K.
Last updated: April 2026 dataHydraulic lime sets and hardens through a chemical reaction with water, distinguishing it from non-hydraulic (air-set) limes and making it particularly valued in historic building restoration, conservation masonry, and specialty mortars where flexibility and breathability are required. France is the leading US import source for this niche product, followed by Mexico and Spain. All imports are classified under tariff line 2523000000, and buyers should confirm whether the product meets ASTM C141 or equivalent European EN 459 standards for their intended application.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Hydraulic lime (heading 2522) is produced from limestone containing silica and alumina impurities that enable hydraulic setting, but it is not Portland cement (heading 2523). The key classification test is the manufacturing process and composition: hydraulic lime is not ground with clinker and does not meet the Portland cement specification. Products marketed as 'natural hydraulic lime' (NHL) belong under 2522300000, not under the cement headings.
France has a long tradition of producing natural hydraulic lime from specific limestone deposits, and French producers have established international reputations for NHL grades used in heritage conservation projects. This technical specialization, combined with established export infrastructure, explains France's leading position in US import supply.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2522300000 | HYDRAULIC LIME | $34K | 10.00% | $3K |
HYDRAULIC LIME
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2522300000 | HYDRAULIC LIME | $79K |
HYDRAULIC LIME
296.3K kg
PORTLAND CEMENT EXCEPT WHITE PORTLAND CEMENT
HS 252329
SULFUR OF ALL KINDS, NOT SUBLIMED,PRECIP,COLLOIDAL
HS 250300
SALT INCL TBL/DENTRD, PURE SODM CHLOR ETC; SEA WTR
HS 250100
UNGRND NAT CAL PHSPH, ALUM CAL PHOS A PHOS CHALK
HS 251010
FLUORSPAR OV 97% OF CALCIUM FLUORD BY WGHT
HS 252922
PEBBLES, GRAVEL ETC. FOR CONCRETE AGGREGATES ETC.
HS 251710
| State | Imports | Exports | Balance |
|---|---|---|---|
| Wisconsin | -- | $34K | +$34K |
| Unidentified | -- | $21K | +$21K |
| Illinois | $7K | $13K | +$6K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| DETROIT, MI | -- | $30K | +$30K |
| LOW VALUE | -- | $21K | +$21K |
| PORT EVERGLADES, FL | $15K | -- | -$15K |