High-Alumina Fire Clay Refractory Mortar from Mexico
A refractory mortar composed primarily of high-alumina fire clay mixed with binders, designed for high-temperature applications like furnace linings. It falls under HTS 3816.00.20.10 as a clay-based refractory composition other than those in heading 3801, providing thermal resistance and adhesion in kiln construction.
Duty Rate — Mexico → United States
13%
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
• Verify clay content exceeds 50% and test thermal resistance to confirm classification under 3816.00.20.10
• Include material safety data sheets (MSDS) and firing temperature specs in documentation to avoid reclassification
• Watch for mislabeling as plain clay (3801), which has different duties; ensure 'refractory composition' labeling