Autoclaved Aerated Concrete (AAC) Blocks from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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