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SITCSection 5
U.S. imports of additives for liquids substituting for mineral oils (nes) (SITC 59729) totaled $9.1M in April 2026, traded with 23 countries.
Importers of Additives for Liquids Substituting for Mineral Oils (NES) paid $1.2M in duties in April 2026 — an effective duty rate of 16% on $7.6M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataCaptured under the 'not elsewhere specified' residual of SITC 597, these additives are formulated for synthetic or bio-based functional fluids — such as polyalkylene glycols, esters, or silicone-based fluids — that serve the same lubrication, cooling, or hydraulic roles as mineral oils but are chemically distinct from them. The NES designation means classification here is a fallback after confirming the product does not fit the more specific mineral-oil-additive or lubricating-oil-additive headings. Correct classification requires detailed knowledge of both the base fluid chemistry and the additive's intended function.
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Products formulated for use in synthetic ester-based aviation lubricants, polyalkylene glycol hydraulic fluids, or silicone heat-transfer fluids — where the carrier is not petroleum-derived — would typically fall here. The NES designation applies when the additive's host fluid is a non-mineral-oil substitute, and the additive itself is not covered by a more specific heading.
A detailed technical data sheet specifying the chemical composition of both the additive and its intended host fluid is essential. Because the NES category is a residual, CBP may scrutinize whether the product belongs in a more specific heading; a binding ruling request can provide classification certainty before large shipments are committed.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| SAUDI ARABIA | -- | $44.4M | +$44.4M |
| CANADA | $587K | $13.1M | +$12.5M |
| MEXICO | $969K | $8.3M | +$7.4M |
| GERMANY | $3.9M | $779K | -$3.2M |
| UNITED ARAB EMIRATES | -- | $3.5M | +$3.5M |
Monthly import values over time