Elastomeric Polyisobutylene Rubber from Mexico
Elastomeric polyisobutylene is a synthetic rubber polymer where isobutylene monomer units constitute 95% or more by weight, classified under HTS 3902.20.10.00 as elastomeric polyisobutylene in primary form. It is used in manufacturing tires, seals, and adhesives due to its high elasticity and impermeability to gases. This primary form excludes finished articles or compounded products.
Duty Rate — Mexico → United States
10%
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
Import Tips
• Verify monomer content exceeds 95% isobutylene via lab testing for classification compliance; provide detailed chemical composition certificates
• Avoid common pitfalls like misclassifying as non-elastomeric under 3902.20.50.00
• Ensure primary pellet or bale form, not processed sheets