Liquid Polyisobutylene Napvis 10 from Japan
Napvis 10 is a low-viscosity liquid polyisobutylene used in cable filling compounds and corrosion inhibitors, classified under tariff item 3902.20.00 as polyisobutylene in primary liquid form. The isobutylene monomer units predominate, meeting the classification criteria.
Duty Rate — Japan → Canada
0%
Import Tips
• Ensure the product is not mixed with fillers or other polymers that would change classification
• Provide viscosity and monomer composition data
• Verify the product is not a prepared additive for mineral oils, which would fall under Chapter 38