Little holes along the surface are formed by pitted concrete, resulting in a thin and cracking finish. Removing any loose or damaged material from the pavement until you can patch pitted sidewalks is important. The most successful way of extracting this loose material is pressure washing the surface at 3000 PSI.
You may be able to remove most loose material using a wire brush and a stiff broom for tiny pitted parts or areas with minimal damage.
Mix a silicone or resin-based concrete resurfacing substance in a bucket of water until the concrete surface is clean and dry. To decide how much water you'll need, refer to the instructions on the box. Pour the mixture onto the pitted sidewalk section, then use a steel trowel or a squeegee to spread it over the soil. Until the surface is smooth and relatively even, continue spreading the compound.
If more than one portion of a sidewalk is patched, cover the seams with tape between each segment until you start holding the patching compound out of the seams. These seams are built to allow movement between the pieces, and if they are covered with a patching product, they can grow ugly surface cracks over time.
Clean the wet surface with a broom after you have applied patching compound to pitted concrete to create a natural texture of the bristle. To ensure the new section is level with the surrounding sections, add more patching compound as required and brush to produce a broom finish.
After fixing pitted concrete, wait 24 hours, then brush on a clear concrete sealer to safeguard the surface from staining and wear. To complete this job, please use a paint brush or roller.
When humidity levels are poor and no rain is expected, apply your patching compound to avoid potential pitting of your concrete surface. The optimum temperatures for this work are between 70 and 75 degrees F, but make sure the concrete surface is at least 50 degrees F before you start if this is not possible. As per the directions on the box, carefully prepare your patching mixture and use caution not to add too much water.
Salt and de-icing products are infamous causes of concrete pitting, so to protect the sidewalks, use these products sparingly.