Methyl Ethyl Ketone Peroxide (MEKP) from Mexico
MEKP is the standard curing agent for unsaturated polyester resins in fiberglass composites and gelcoats. As a ketone peroxide solution, it falls under HTS 2909.60.5000 per Chapter 29 for organic peroxides dissolved in solvents for safe transport (note e).
Duty Rate — Mexico → United States
13.7%
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
• Phthalate diluent content declaration required to confirm transport solvent suitability
• 9% active oxygen specification prevents explosive classification under UN standards
• Avoid Chapter 32 paint hardener reclassification with polymerization catalyst documentation