Prepare the crack for the repair materials by knocking away any loose or deteriorating material and beveling the edges down and outward with a cold chisel. Sweep or vacuum the debris and thoroughly dampen the repair area. Do not, however, allow any water to pool.
Mix the repair product to fill the crack according to the manufacturer’s instructions. Here, a fast-setting cement repair product with acrylic fortifier is being used Trowel the product into the crack, overfilling slightly. With the edge of the trowel, trim the excess material and feather it so it is smooth and the texture matches the surrounding surface.