Five Star Structural Concrete® S300 is a normal setting, one component, enhanced hydraulic cement mortar used for pourable and pumpable repairs of concrete structures. Five Star Structural Concrete® S300 may be extended with coarse aggregate for large volume repairs and foundation upgrades. Five Star Structural Concrete® S300 provides increased corrosion protection of steel reinforced structures with migrating corrosion inhibitor technology and very low chloride ion permeability.