Prevulcanized Butyl Rubber Paste from Mexico
Paste form of prevulcanized isobutene-isoprene rubber (IIR) for adhesive applications, explicitly allowed under chapter notes. Classified in 4002.31.00.00 as primary paste form without prohibited vulcanizing agents beyond prevulcanization.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Distinguish prevulcanized latex from fully compounded; provide vulcanization test data
• Label clearly as 'prevulcanized primary form' to match note 5(a) exception