Use CR Concrete Resurfacer, an advanced hydraulic cement-based mortar, to resurface damaged or discolored concrete. CR CONCRETE RESURFACER, when applied in thicknesses from 1/32 inch to 1/2 inch, has a working time of up to 30 minutes, and produces a smooth and durable surface that is able to receive foot traffic in as little as 2-3 hours. Using cutting-edge self-curing technology (SCT), CR does not need to be wet cured in most applications. It has been specially formulated to match the color of typical portland cement concrete, and can be used for both interior and exterior applications. One 25-lb bag yields approximately 0.22 cubic feet. Coverage at 1/8 inch is approximately 21.1 square feet.