Sound-Absorbing Concrete Blocks from Mexico
Concrete blocks engineered with internal textures or materials to reduce noise in urban barriers or studios. HTS 6810.11.00.70 applies as unreinforced building blocks of artificial stone for construction. Acoustic properties don't change core classification.
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
• Include acoustic test reports (e.g
• NRC ratings) but tie to building use
• Avoid claiming specialty finishes; declare as plain concrete
• Watch for fiber additives pushing to reinforced category