Butyl Rubber O-Ring for Vacuum Chamber Seals from Canada
Low-permeation butyl IIR O-ring for maintaining vacuum in semiconductor processing chambers. Classifies under HTS 4016.93.50.10 as vulcanized rubber O-ring seal. Excellent gas impermeability.
Duty Rate — Canada → United States
12.5%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Outgassing data sheets required for cleanroom/semiconductor qualification
• Specify permeation rates vs other rubbers to justify butyl classification
• ESD-safe packaging prevents contamination during transit