3921.11.00.00/Polystyrene Foam Insulation Panels/Japan

Polystyrene Foam Insulation Panels from Japan

Extruded polystyrene (XPS) foam panels designed for building wall and roof insulation. Falls under 3921.11.00.00 as cellular sheets of styrene polymers, confirmed by predominant styrene content. Provides high R-value thermal resistance.

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

• Include technical specs showing cellular structure and styrene polymer certification

• Check for size limits under US note for heading 3921 special rates

• Avoid blending with other polymers exceeding 5% threshold