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HSChapter 40
U.S. imports of isoprene rubber (ir) — primary forms, plates, sheets & strip (HS 400260) totaled $1.9M in April 2026, traded with 11 countries.
Importers of Isoprene Rubber (IR) — Primary Forms, Plates, Sheets & Strip paid $191K in duties in April 2026 — an effective duty rate of 10% on $1.9M in dutiable value, based on actual customs collections rather than the published tariff schedule. Isoprene Rubber (IR) — Primary Forms, Plates, Sheets & Strip imports of $1.9M in April 2026 ran 37% above the year-to-date monthly average of $1.4M.
Last updated: April 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.
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.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 4002600000 | ISOPRENE RUBBER (IR) | $1.9M | 10.28% | $191K |
ISOPRENE RUBBER (IR)
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 4002600000 | ISOPRENE RUBBER (IR) | $7.4M |
ISOPRENE RUBBER (IR)
1.9M kg
NEW PNEUMATIC TIRES OF RUBBER, FOR MOTOR CARS
HS 401110
NEW PNEUMATIC TIRES OF RUBBER, FOR BUSES OR TRUCKS
HS 401120
GASKET, WASHERS & OTHER SEALS, OF VULCANIZED RUB
HS 401693
ARTICLES OF SOFT VULCANIZED RUBBER NESOI
HS 401699
MEDICAL/SURGICAL/DENTAL/VET GLOVES, MITTENS, MITTS
HS 401512
NEW PNEUMATIC TIRES OF RUBBER, NESOI
HS 401190
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $111K | $5.0M | +$4.9M |
| California | $6K | $1.1M | +$1.1M |
| Ohio | $186K | $823K | +$638K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | -- | $3.7M | +$3.7M |
| LOS ANGELES, CA | $500K | $640K | +$141K |
| LAREDO, TX | -- | $828K | +$828K |