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SITCSection 5
U.S. exports of prepared additives for cements, mortars & concretes (SITC 59897) totaled $12.2M in July 2026.
Importers of Prepared Additives for Cements, Mortars & Concretes paid $576K in duties in July 2026 — an effective duty rate of 14% on $4.1M in dutiable value, based on actual customs collections rather than the published tariff schedule. Prepared Additives for Cements, Mortars & Concretes imports of $7.6M in July 2026 ran 14% above the year-to-date monthly average of $6.7M.
Last updated: July 2026 dataFormulated admixtures—including plasticizers, accelerators, retarders, air-entraining agents, and shrinkage reducers—are performance-critical inputs for the construction industry, allowing concrete producers to tailor workability, set time, and durability to project specifications. Unlike raw mineral components, these prepared additives are chemical formulations that may contain surfactants or polymers subject to EPA TSCA inventory requirements. Demand tracks closely with infrastructure and commercial construction cycles, making this a volume-sensitive category for chemical distributors supplying ready-mix and precast concrete operations.
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253 shipments/mo
Basic heading 272 of 465 in section 5
Basic heading 59897 · $7.6M of $28.9B
Prepared admixtures containing chemical substances not listed on the TSCA Chemical Substance Inventory may require pre-manufacture notification before import. Importers must certify TSCA compliance or non-applicability at entry; formulations containing novel polymers or surfactants warrant particular scrutiny. A licensed customs broker or TSCA consultant should review the product's Safety Data Sheet against the TSCA inventory prior to shipment.
Accelerators shorten concrete set time and are used in cold-weather pours or rapid-turnaround precast production, while retarders extend workability for large pours or hot-weather conditions. Although both fall within this SITC heading, importers and buyers should specify the admixture type in purchase contracts and technical data sheets, as substitution between types can cause significant structural performance issues.
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Exports · July 2026
destination
Canada and Mexico together take 45% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$7.6MYoY · Pro
Exports
$12.2MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.