Unsaturated Polyester Resin (UPR) from United States
Liquid unsaturated polyester resin (UPR) for fiberglass composites in marine and construction applications, supplied in primary form before curing. This polyester is classified under 3907.99.00 as other polyesters, as it is not specifically named in other subheadings and meets the definition of a polyester in primary form. The product is a liquid, which is a primary form under chapter note 6, and is not a composition with additives exceeding 1% by weight.
Duty Rate — United States → Canada
Import Tips
• Verify the resin is not a solution in volatile organic solvents exceeding 50% by weight, as this would classify under heading 32.08
• Keep safety data sheets and technical specifications to support classification as a polyester
• Ensure the resin is not mixed with curing agents or accelerators, which might change its classification