Concrete Countertops: How to Repair Chips and Cracks

Lead Image
  • 48-72 hours
  • Advanced
  • 100-175
What You'll Need
Concrete sealer
Safety equipment

This concrete countertops "how to" repair guide is intended to provide simple procedures on how to repair chips and cracks in concrete countertops. While it may seem that concrete countertops are not as stylish and glamorous as marble, granite or ceramic countertops, the truth is, concrete is a chameleon that can imitate any high quality countertop available.

Although concrete is a very durable material, it may still chip and crack due to mishandling (such as a heavy object falling down on top of it). Read the steps on the repair guide below for more information on fixing the damaged countertop.

Step 1 - Determine the Concrete Mix to be Used for Patching

Make sure to get the exact formula that was used to make your concrete countertop in order to get the most accurate match in color and texture. If the concrete countertop was built by a contractor, get in contact with them to get this information. If the exact formula cannot be retrieved, then you may have to resort to trial and error and make the best possible guess. Before the patching procedure, clean the countertop and remove any debris trapped inside the chip or crack.

Step 2 - Mix and Apply the Concrete Patch

Mix the concrete to a consistent color and texture and use it to patch the chipped and cracked areas. Use a trowel to level the patch. Before allowing the concrete to cure, make sure the patch is smooth and flat. Allow the concrete to cure for about 24 hours. If the weather is very humid, then, allow the concrete to cure for 24 hours more.

Step 3 - Sand the Entire Countertop

It is best to sand the entire countertop to make sure the surface is kept uniform.

WARNING: Before the sanding procedure, make sure to wear a mask and safety goggles for protection. Start the sander and begin sanding the surfaces using rough grit sandpaper.

Use fine grit sandpaper afterwards to create a smoother finish. Sand the edges of the countertop as well to avoid having sharp edges that can easily crack. When the countertop has been restored to its original beauty, wipe the dust with a clean rag.

Step 4 - Seal the Surfaces

Sealing is an important procedure during countertop repair. The sealer will protect the concrete from stains and scratches as well as other damages in the future. Since concrete is a porous material, water and other contaminants can easily seep through the pores. In order to protect the concrete countertop from stains, make sure to find an effective concrete countertop sealer. Read online articles or forums for recommendations.

Before sealing the countertop, allow it to dry first. Never use sealer on a wet countertop because trapped water will cause damage afterwards. Prepare the sealer in a plastic pan. Use a paintbrush to cut the sealer on all concrete surfaces and allow it to dry for about 24 hours.