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SITCSection 2
U.S. imports of acrylonitrile-butadiene rubber (nbr) in primary forms (SITC 23215) totaled $10.5M in April 2026, traded with 21 countries.
Importers of Acrylonitrile-Butadiene Rubber (NBR) in Primary Forms paid $885K in duties in April 2026 — an effective duty rate of 10% on $8.8M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataNitrile rubber (NBR) is the elastomer of choice for oil-resistant seals, gaskets, and hoses across the automotive, aerospace, and oil-and-gas sectors, with its acrylonitrile (ACN) content — typically ranging from 18% to 50% — directly governing the balance between oil resistance and low-temperature flexibility. Higher ACN grades provide superior resistance to petroleum-based fluids but stiffen at lower temperatures, a trade-off that buyers must specify precisely in purchase contracts. Hydrogenated NBR (HNBR), a further-processed derivative, classifies differently and should not be conflated with standard NBR at the point of import.
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No — all ACN content grades of standard NBR classify under the same heading regardless of whether the ACN content is 18%, 33%, or 50%. The ACN percentage is a critical commercial specification that should appear on the certificate of analysis and purchase order, but it does not create a separate tariff line.
HNBR is produced by selectively hydrogenating the double bonds in NBR, yielding a chemically distinct polymer with superior heat and ozone resistance. It may classify under a different heading than standard NBR depending on the applicable tariff schedule, so importers should obtain a binding ruling or consult a licensed customs broker before assuming HNBR falls under the same line as conventional nitrile rubber.
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| Country | Imports | Exports | Balance |
|---|---|---|---|
| KOREA, SOUTH | $3.0M | $1.6M | -$1.4M |
| JAPAN | $3.1M | $785K | -$2.3M |
| MEXICO | $1.7M | $2.1M | +$360K |
| NETHERLANDS | -- | $3.6M | +$3.6M |
| CHINA | $36K | $3.2M | +$3.1M |
Monthly import values over time