Jesmonite Retarder: Retarding solvent for extending working time for AC100, AC200 and AC300 composites. Add the retarder into already prepared material, maximum 2-8 g/kg. To determine the set time, test it on a small sample. Store at a temperature between 5-25 °C. Seal well after use, use within 6 months from opening. Not suitable for direct contact with food.