U.S. imports of Hydraulic Lime (HS 252230) totaled $59K in August 2026, imported from 5 countries.
Importers of Hydraulic Lime paid $4K in duties in August 2026, an average duty rate of 7.32% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Hydraulic Lime imports of $59K in August 2026 ran 58% above the year-to-date monthly average of $37K.
Last updated: August 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.
6 import shipments a month
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.
Subheading 3 of 3 in heading 2522
Subheading 252230 · $59K of $8.5M
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 |
|---|---|---|---|---|---|
| 2522300000 | Hydraulic Lime | $59K | 7.32% | 73.16% | $4K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2522300000 | Hydraulic Lime | $43K |
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
$59KYoY · free account
Exports
$43KYoY · free account
Low of 11 reported months · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $387K of Hydraulic Lime and exported $656K.
Fewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026 · imports 11 of 12 months reported. Source: U.S. Census Bureau.
Imports · August 2026
origin
France and Mexico together supply 100% of it. France pays 10.0% duty; Mexico 0.0%.
customs district
destination
entry
rate provision · imports
26.8% enters free of duty; duty collected equals 7.32% of imports for consumption.