Outdoor Butyl Tape Caulking Compound from United States
A roll-form butyl rubber caulking mastic applied via tape for RV, gutter, and flashing seals. It is self-adhering for weatherproofing and falls under tariff item 3214.10.90 as a caulking compound despite its tape format.
Duty Rate — United States → Canada
6.5%
Import Tips
• Confirm the tape is not a separate chemically defined compound
• Verify it is not classified as a self-adhesive tape under Chapter 39
• Document the mastic composition to support classification under 3214.10.90