How to Repair a Chipped Concrete Step Edge

Using a stiff brush or wire brush, vigorously scrub the chipped area to dislodge any loose concrete particles, dirt, or old paint. For finer dust, a shop vacuum or compressed air can be used to ensure the surface is completely clean. The area should be dry before proceeding to the next step.

If the chip has sharp, feather-edged concrete, use a chisel and hammer to slightly undercut the edges of the damaged area. This creates a small 'keyway' or 'dovetail' shape that helps to lock the repair material in place. Aim for an undercut of about 1/4 inch deep. Brush away any dust created by this process.

Read the instructions on the concrete repair compound packaging carefully. In a clean mixing container, add the specified amount of powder and then slowly add the recommended amount of water. Mix thoroughly with a trowel or mixing paddle until a smooth, consistent, workable paste is achieved. Avoid mixing more than you can use within the product's pot life.

Using a trowel or putty knife, forcefully press the mixed repair compound into the prepared chip, starting from the back of the void and working outwards. Ensure there are no air pockets. Overfill slightly to allow for compacting and finishing.

While the repair compound is still wet and workable, use a damp trowel or float to smooth the surface. Work from one side to the other, feathering the edges of the repair to blend with the surrounding concrete. Aim to recreate the original rounded or square edge profile of the step. Use a damp brush or sponge for final texturing if needed to match the surrounding concrete.

Protect the repaired area from direct sunlight, extreme temperatures, and heavy traffic while it cures. Some products may require misting with water periodically to ensure proper curing, while others should be kept dry. Refer to the product packaging for specific curing times and methods. Avoid walking on or applying any load to the repaired step until the full cure time has elapsed.