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3902.20.50.00/Vistanex Polyisobutylene HMW/Japan

Vistanex Polyisobutylene HMW from Japan

Vistanex HMW (high molecular weight) polyisobutylene used in asphalt modification and roofing sealants, classified HTS 3902.20.5000 as 'Other' with >95% isobutylene content in slab form. Enhances elasticity and weather resistance in bituminous products.

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

• Provide ash content and softening point analysis; declare slab dimensions to confirm primary form; test for oxidative stability affecting end use claims

Vistanex Polyisobutylene HMW from Japan — Import Duty Rate | HTS 3902.20.50.00