Silica-Based Refractory Mortar from China
A mortar mix of ground silica, clay binders, and additives for joining refractory bricks in high-heat environments like coke ovens. Classified under HTS 3816.00.20 as 'other' refractory compositions, it withstands temperatures up to 1700°C. Ideal for glassmaking furnaces and incinerators.
Duty Rate — China → United States
40.5%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Provide test reports confirming silica content >90% and bonding strength to comply with refractory definitions
• Label for respiratory hazards from free silica; use UN-approved bags for international shipping