WunderFixx® Concrete Patching Compound is a durable, Fast-Setting, one component concrete patching material formulated with a premium grade hydraulic cement, high performance polymers, and a finely ground aggregate. When mixed with water WunderFixx® produces a workable, easy to apply mixture with excellent bonding characteristics. Trowel WunderFixx® over existing concrete in thicknesses from feather-edge to ½” to achieve a smooth and uniform concrete appearance. After application, WunderFixx® may be sanded to achieve an ultra smooth finish.