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U.S. exports of isoprene rubber (ir) — primary forms, plates, sheets & strip (HS 400260) totaled $5.2M in July 2026.
Importers of Isoprene Rubber (IR) — Primary Forms, Plates, Sheets & Strip paid $416K in duties in July 2026 — an effective duty rate of 18% on $2.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Isoprene Rubber (IR) — Primary Forms, Plates, Sheets & Strip imports of $2.5M in July 2026 ran 46% above the year-to-date monthly average of $1.7M.
Last updated: July 2026 dataSynthetic isoprene rubber closely mimics the molecular structure of natural rubber and serves as a drop-in substitute in tire manufacturing, medical devices, and high-performance adhesives where consistent purity and controlled Mooney viscosity are required. Japan is the leading US supplier, with Russia a significant second source — a supply-chain concentration that has drawn increased scrutiny from procurement teams managing geopolitical risk. All imports fall under tariff line 4002600000.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
27 shipments/mo
Natural rubber (NR) is classified under HTS heading 4001, while synthetic isoprene rubber (IR) falls under heading 4002. Although IR replicates the cis-1,4-polyisoprene structure of NR, it is produced by polymerization of petrochemical isoprene monomer. For classification, the key distinction is origin — biological versus synthetic — not chemical structure. Buyers substituting IR for NR should update their HTS declarations accordingly.
Russia has historically been a major global producer of synthetic isoprene rubber. Importers relying on Russian-origin IR should monitor applicable US sanctions, export controls, and any trade-remedy measures that may affect admissibility or duty treatment. Diversifying to Japan or other suppliers is a risk-mitigation strategy that procurement teams have increasingly evaluated.
HSChapter 40
Subheading 9 of 14 in heading 4002
Subheading 400260 · $2.5M of $116.1M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 4002600000 | Isoprene Rubber (Ir) | $2.5M | 16.89% | 96.34% | $416K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 4002600000 | Isoprene Rubber (Ir) | $5.2M |
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.
ImportsExports
Imports
$2.5MYoY · Pro
Exports
$5.2MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Mexico and Canada together take 57% of it.
customs district
origin
entry
rate provision · imports
3.7% enters free of duty; the effective duty rate is 16.89%.