Butyl Rubber Glazing Sealant from Canada
Butyl rubber glazing sealant is a non-hardening mastic tape or compound for insulating glass units. Its dead-soft properties seal edges permanently under HTS 3214.10.00.
Duty Rate — Canada → United States
63.7%
Rate breakdown
9903.03.1450%Articles the product of Canada as provided in subdivision (b)(3) of U.S. note 51 to this subchapter
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
• Provide rubber content analysis to confirm mastic vs polymer classification
• Include compatibility certificates for PVC and aluminum spacers
• Declare tape vs compound form explicitly in entry documents