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3921.11.00.00/Flame-Retardant PS Foam Sheets/Mexico

Flame-Retardant PS Foam Sheets from Mexico

Cellular polystyrene sheets with chemical modification for fire resistance in building/construction. Still 3921.11.00.00 as base styrene polymer per subheading note (c). Self-extinguishing.

Duty Rate — Mexico → United States

15.3%

Rate breakdown

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

• Document flame retardant as modification not changing base polymer

• UL certifications speed clearance

• Avoid 'Other' subheading confusion