Liquid Polyisoprene Rubber (LIR) from United States
Liquid polyisoprene rubber (LIR) is a low molecular weight liquid derivative of natural cis-1,4-polyisoprene, used as a reactive plasticizer in tires and sealants. It is supplied in primary liquid form in drums. As a modified natural polymer, it is classified under this tariff item.
Duty Rate — United States → Canada
0%
Import Tips
• Document that the LIR is derived from natural rubber, not synthetic polyisoprene, to support classification
• Ensure the liquid form qualifies as primary forms under Chapter 39
• Verify the product is not excluded as a lubricating preparation under heading 27.10 or 34.03