3824.40.20.00/Gypsum-Based Concrete Retarder/Japan

Gypsum-Based Concrete Retarder from Japan

A powdered inorganic blend primarily of calcined gypsum and phosphates used to extend working time of concrete in hot weather conditions. HTS 3824.40.20.00 because it's wholly inorganic and specifically prepared for cement retardation. Prevents flash set in mass concrete pours.

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

• Dosage sensitivity requires precise labeling; ASTM C494 compliance documentation; distinguish from plaster preparations