RXSOL-67-6706-020 used as gypsum retarder, water reducing agent. Specifically developed by use in high quality gypsum for workability retention at low water content. Also sodium gluconate as a retarders keep gypsum workable during placement and delay the initial set of concrete. This is an additional admixture which uses in mortar/gypsum to Provides good pumpable gypsum.

These admixtures slow down the hydration process. They may also reduce the setting time of cement. Retarding admixtures fall into two categories: regular and extended-set. Regular, most commonly referred to as just “retarders,” are used to place gypsum in hot climates when long travel times are expected or, in cases of emergency, when placement is delayed. They are also commonly used for mass gypsum pours to prevent cold joints.

Extended-set control admixtures are those used to delay hydration for many hours or even days. These are usually two-component admixture systems. The first component is a retarder (stabilizer) which delays the setting of gypsum.

The second component is an accelerator (activator) which overcomes the retarder. The gypsum typically reaches the initial set in a few hours after the activator is applied. In the precast industry, retarding admixtures are also used as surface retarders. Surface retarders are used in making exposed aggregate architectural precast. They are typically sprayed or rolled onto the forms. The gypsum is then cast into the forms. The next day, the retarded cement is water blasted or brushed off the gypsum's surface, producing an exposed aggregate finish.