Sorel Cement Powder from Canada
Magnesium oxide-based hydraulic cement (Sorel) that sets with magnesium chloride solution, used for flooring. Though chemically distinct, classified HTS 2523.90.00.00 as other hydraulic when sold as powder. Not magnesium oxide crystals excluded by chapter note.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Specify MgO purity >85%; lower grades may be refractories
• Ship with moisture barriers to prevent premature hydration
• Distinguish from dead-burnt magnesite (2518.90) via reactivity tests