How to Repair an Artificial Flagstone Walkway With a Crack in the Cement

Repair Cracks Between Artificial Flagstones

• 1

  Use a hose and a stiff hand brush to clean the crack of any dirt and debris, taking care not to damage the artificial flagstones.

• 2

  Use a cold chisel to expand the crack into the shape of a V that is about 1 1/2 inches wide at the top and 1 inch deep, and remove any new debris left behind.

• 3

  Measure the depth of the hole, and pour fine-grained sand into the crack until it is about 1/2 inch from the walkway surface.

• 4

  Mix a small amount of cement until the mixture is stiff enough to keep the shape of a ball.

• 5

  Add water to the crack, the sand in the crack and the immediate area surrounding the crack in the concrete. Spread the cement mixture into the crack with a caulking gun or putty knife, depending on how wide the hole is.

• 6

  Gently tamp the surface of the new cement to pack it into the crack, and then scrape off any excess cement. Wait about 2 hours for the cement to dry, then spray the new cement with more water.

• 7

  Cover the repaired cement with plastic and avoid walking on it for three days. Water the area around the cement twice a day to increase the longevity of the repair.

Repair Cracks in Artificial Flagstones

• 8

  Clean the entire surface of the walkway if the crack is in the artificial stones. Use a cement floor cleaning solution and a scrub brush. Wear goggles when working with the cleaning solutions to protect your eyes from splatters. Wash off the surface with a hose and step away for at least a day so it can dry completely.

• 9

  Mix a small amount of patch concrete with 1 part cement, 4 parts sand and enough water for a stiff consistency. Use a putty knife or caulk gun to pack the concrete into any cracks in the artificial flagstones. Scrape off excess concrete and wipe off splatters with a moist rag.

• 10

  Call the artificial stone manufacturer and ask for the exact name of the color of your stones, or if the stones are painted onto a flat cement surface match the paint color. Drizzle the same paint color or a combination of natural colors into a paint tray and stir the paint with a wooden stir stick.

• 11

  Cut upholstery foam into the size and shape of the flagstone you are repairing.

• 12

  Dab the foam into the paint to cover the surface, brush off any excess onto newspaper and press the foam onto the patched artificial flagstone.