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%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide ash content and softening point analysis; declare slab dimensions to confirm primary form; test for oxidative stability affecting end use claims