Micaceous Fire-Clay from Mexico
Micaceous fire-clay blends clay with natural mica flakes for enhanced thermal insulation in refractories. Classified in HTS 2508.30.00.00 as fire-clay, not split block mica. Applied in lightweight kiln furniture.
Duty Rate — Mexico → United States
10%
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
• Quantify mica <20% to stay in clay heading; higher shifts risk
• Distinguish from 2525 mica splittings via thickness tolerances
• Use XRF analysis reports for composition transparency