Elastomeric Polyether Polysulfide Resin PER-50 from China
Elastomeric Polyether Polysulfide Resin PER-50 is a primary form copolymer for flexible sealants in construction. It qualifies for HTS 3911.90.10.00 as an elastomeric polysulfide where the named units contribute ≥95% by weight per subheading note (a)(2). The polyether modification enhances flexibility without altering primary classification.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.88.0225%Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
Import Tips
• Provide FTIR or NMR analysis confirming ≥95% polysulfide/polyether comonomer content for subheading (a)(2)
• Label clearly as 'primary form' to prevent confusion with finished adhesives in 3506 or 3921