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Andalusite-Based Refractory Gun Mix from Mexico

Gunning refractory with andalusite for aluminum reduction cell repairs. HTS 3816.00.20.50 classification for thermal shock resistance to 1500°C. Needle-like crystals enhance mullite formation.

Duty Rate — Mexico → United States

13%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico

Import Tips

Andalusite crystal orientation certs for performance claims

Avoid kyanite confusion via mineral analysis