This document provides information on Glenium C 317, a polycarboxylate-ether based, high range water reducing admixture for concrete. It was primarily developed for applications requiring high early strength and durability. Glenium C 317 allows for production of concrete with very low water-cement ratios, resulting in high strength concrete. It is chloride free and meets ASTM C494 Type A and F specifications. Glenium C 317 uses a new chemical mechanism compared to traditional water reducers, improving cement dispersion and stabilization. It is recommended for use in precast concrete, self-compacting concrete, and structural concrete requiring early strength.