High Cis Elastomeric Polyisobutylene HMW from United States
High molecular weight elastomeric polyisobutylene with high cis content and over 95% isobutylene by weight, imported as primary polymer. It is used in sealants, roofing membranes, and vibration dampers, and is classified under tariff item 3902.20.00.
Duty Rate — United States → Canada
0%
Import Tips
• Ensure the product is not chemically modified in a way that changes its classification
• Provide technical data sheets showing the isobutylene content
• Verify the product is not a composition with fillers or plasticizers exceeding 1% by weight