HIGH END SUPER PLASTICIZERS APPLICATION & FEATURES GEEKAY PLAST XR-W40 is poly carboxyl ate ether based new range water reducing admixtur COMPOSITION &CONDITIONS GEEKAY PLAST XR-W40 is available as a ready to use liquid, which is dispensed into the concrete along with mixing water. It is desirable to add the admixture after about 50% of the mixing water is added into the mixture. Suitable mixture proportioning procedures need to be adhered to in order to obtain the optimal admixture efficiency.