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4002.20.00.00/Synthetic Isoprene-Butadiene Rubber (SIBR)/Japan

Synthetic Isoprene-Butadiene Rubber (SIBR) from Japan

BR copolymerized with small isoprene for tire treads, in granular primary form. Classifies under HTS 4002.20.00.00 if predominantly butadiene rubber meeting BR criteria.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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Import Tips

• Monomer ratio analysis required to confirm BR dominance over ISR classification

• Vulcanization compliance testing essential for copolymer synthetic rubber status