White Cement Clinkers from Mexico
White cement clinkers are intermediate nodules from the kiln firing process of low-iron raw materials, ground into finished white Portland cement. Under HTS 2523.21.00.00 as white Portland cement in clinker form, not yet pulverized. Imported for final grinding at destination mills.
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
• Provide kiln process logs showing low iron raw materials to substantiate white clinker status during customs valuation
• Use moisture-proof bulk bags for clinkers to prevent pre-hydration during ocean transit
• Avoid declaring as finished cement; clinkers have different grinding yield factors affecting duty calculations