Silicone Resin in Solid Form from Canada
Silicone resin is a heat-resistant, solid silicone polymer used in coatings and electrical insulators. Classified under HTS 3910.00.00.00 as silicones in primary forms, meeting the 95% siloxane monomer requirement per subheading notes.
Duty Rate — Canada → United States
13%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Obtain technical data sheets confirming primary form and siloxane predominance to prevent reclassification as finished paints
• Label containers clearly as 'primary silicone resin' for CBP inspection
• Watch for copolymer blends exceeding 5% non-siloxane content triggering alternative headings