Autoclaved Aerated Concrete (AAC) Blocks from Mexico
AAC blocks are lightweight, precast concrete with air-entraining agents, steam-cured for insulation and fire resistance in modern buildings. HTS 6810.11.00 covers these as concrete building blocks.
Duty Rate — Mexico → United States
13.2%
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
• Certify AAC production process (autoclaving) to differentiate from standard concrete
• Check for moisture content limits during import to prevent damage claims
• Document thermal conductivity for energy code compliance in destination markets