A sustainable approach is to improve the durability of concrete to reduce maintenance cost, save energy and materials. If we could extend the service life from 50 years to 150 years or more, we could postpone for 100 years the costs connected to the consumption of natural resources. Concrete can be made more durable by reducing the permeability of hardened concrete. As per ACI 212.3R.10, Permeability Reducing Admixtures or PRA’s are classified in three classes. Mapei is the solution for sustainable concrete that is Idrocrete KR 1000 a powder admixture made from special hydrophilic components which, when added to a concrete mix, reduces the permeability of hardened concrete. Idrocrete KR 1000 is compatible with all WR and HRWR admixtures; for quality concrete we recommend use of Mapei concrete admixtures-Mapeplast, Mapefluid and Dynamon ranges.