Insulating Ceramic Filler Bricks from Mexico
Low-density ceramic bricks with insulating properties used as fillers in composite building panels. Fired from lightweight clay aggregates at >800°C, classified in HTS 6904.90 as other ceramic support or filler tiles.
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
• Explicitly state non-electrical use to avoid Chapter 85 exclusion
• Thermal conductivity tests aid in proving building insulation intent
• Avoid bulk import with refractories to prevent averaging issues