Vistanex Polyisobutylene HMW from China
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 — China → United States
41.5%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
Import Tips
• Provide ash content and softening point analysis; declare slab dimensions to confirm primary form; test for oxidative stability affecting end use claims