3921.11.00.00/Flame-Retardant PS Foam Sheets/Japan

Flame-Retardant PS Foam Sheets from Japan

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 — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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Import Tips

• Document flame retardant as modification not changing base polymer

• UL certifications speed clearance

• Avoid 'Other' subheading confusion