Vistanex Polyisobutylene HMW from China
Vistanex HMW (high molecular weight) polyisobutylene is used in asphalt modification and roofing sealants, classified under tariff item 3902.20.00 with over 95% isobutylene content in slab form. It enhances elasticity and weather resistance.
Duty Rate — China → Canada
0%
Import Tips
• Ensure the slab form is considered a primary form (blocks of irregular shape)
• Provide the isobutylene content and molecular weight data
• Verify the product is not mixed with asphalt or other materials