3902.90.00.50/Polyisobutylene Rubber PIB/Mexico

Polyisobutylene Rubber PIB from Mexico

Polyisobutylene (PIB) is a synthetic rubber polymer derived from isobutylene monomer, imported in primary pellet form under HTS 3902.90.0050 as 'other' olefin polymers. With isobutylene comprising over 95% by weight, it meets subheading note (a)(1) criteria. Used in chewing gum bases, adhesives, and sealants for its tackiness and impermeability.

Duty Rate — Mexico → United States

6.5%

Rate breakdown

9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
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Import Tips

• Include FTIR or NMR test reports proving >95% isobutylene monomer content

• Label clearly as 'primary forms' to distinguish from compounded rubber products

• Check for copolymer content; excess may reclassify under predominant monomer rule

Polyisobutylene Rubber PIB from Mexico — Import Duty Rate | HTS 3902.90.00.50