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
13.7%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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