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%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Dosage sensitivity requires precise labeling; ASTM C494 compliance documentation; distinguish from plaster preparations