Polyisobutylene Rubber PIB from Mexico
Polyisobutylene (PIB) is a synthetic rubber polymer derived from isobutylene monomer, imported in primary pellet form. With isobutylene comprising over 95% by weight, it is classified as 'other' olefin polymers under tariff item 3902.90.00, as it is not specifically named in other subheadings of heading 39.02.
Duty Rate — Mexico → Canada
0%
PGA flags
No agency flag on this HTS number in the CBSA Single Window matching criteria.
CBSA Single Window matching criteria, unknown
Import Tips
• Confirm that the PIB is in primary forms (pellets, granules) and that isobutylene monomer content exceeds 95% by weight
• Maintain supplier certificates of analysis to support classification
• Check if the PIB qualifies as a synthetic rubber under Chapter 40, which may affect classification and duties