3902.90.00.50/High MW Polyisobutene Pellets/Japan

High MW Polyisobutene Pellets from Japan

High molecular weight polyisobutene pellets (>95% isobutene units) for asphalt modification and sealants, under HTS 3902.90.0050 as primary 'other' olefins. Its viscosity index makes it ideal for industrial modifiers. Meets strict polymer purity notes.

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%

Calculate with your customs value Verify classification with AI

Import Tips

• Certify molecular weight distribution for classification support

• Prevent contamination with fillers that could trigger 3824

• Label with flash point data for hazmat compliance