Vermiculite Ceramic Insulating Brick from Mexico
Solid building brick incorporating expanded vermiculite aggregate in a fired clay matrix for superior thermal resistance, used in energy-efficient wall construction. Classified under HTS 6904.10.0010 as heat insulating solid bricks meeting fired ceramic criteria with low thermal conductivity (<0.2 W/mK). Exceeds tile thickness per US notes.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• 1
• Submit material composition analysis showing clay base with vermiculite filler to confirm ceramic nature. 2
• Include manufacturer specs confirming firing process and heat insulation rating. 3
• Beware of misdeclaration as lightweight concrete blocks (Chapter 68) without proper ceramic firing proof