High-Performance MS Polymer Caulk from United States
A modified silane (MS) polymer hybrid caulking for demanding joints, combining silicone and polyurethane benefits. It is UV-stable and isocyanate-free, serving as a caulking mastic for construction gap sealing under tariff item 3214.10.90.
Duty Rate — United States → Canada
6.5%
Import Tips
• Confirm the product is not a separate chemically defined compound
• Verify it is not a preparation of heading 3207, 3208, 3209, or 3215
• Document the polymer composition to support classification as an 'other' mastic