Cement Sandwich Building Blocks from Japan
Sandwich blocks with a concrete core and insulating foam layers bonded by cement, used for energy-efficient walls. Classified in HTS 6810.11.00 as composite concrete building blocks.
Duty Rate — Japan → United States
13.2%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Specify insulation material in docs; foam content under 20% keeps it as concrete block
• Comply with building insulation standards like R-value declarations
• Avoid classifying as 'prefab panels' to stay in blocks category