ProLong – Hydration Control Admixture is a dry powdered chemical admixture that is engineered to prolong the workability of concrete. ProLong can be used to stabilize wash water or returned concrete. The use of ProLong – Hydration Control Admixture results in improved finishability in stamped concrete by controlling the set of the concrete. ProLong – Hydration Control Admixture is packaged in water soluble plastic bags.