Butyl Rubber Glazing Sealant from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, 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