Potassium Fluozirconate and Sodium Silicate Additive from Mexico
Complex inorganic mixture of potassium fluozirconate and sodium silicate for anti-veining additives in iron foundry molds. Classified HTS 3824.99.39.90 for specialized foundry process chemicals. Prevents sand expansion defects in heavy section castings.
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
• Demonstrate veining reduction test results from foundry trials; ensure fluozirconate purity certification; segregate from moisture to prevent premature zircon precipitation