Hydroxy-Terminated Polydimethylsiloxane from Canada
Hydroxy-terminated PDMS is a reactive silicone fluid used in sealants and adhesives production. It qualifies under HTS 3910.00.00.00 as a primary form silicone per note (a)(3) for chemically modified polymers not more specifically covered.
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
• Document hydroxy modification as minor per Chapter 39 notes to stay in 3910; excessive modification risks 'Other' reclassification
• Include viscosity and MW specs in import docs
• Test for purity to avoid blending penalties