Concrete is durable but after years of wear, it can crack due to moisture or temperature changes. There is no need to call in the pros when this happens because you can make simple repairs to cracked concrete. No previous experience is required and only a few tools are needed. After the repair, the area will look as good as new.
You will need:
• Wire brush
• Masonry crack filler sold in a cartridge
• Caulk gun
• Vinyl concrete patching compound
• Patching mortar (optional)
• Bonding agent (optional)
• Putty knife
• Small sledge hammer
• Long pants
• Long sleeved shirt
• Safety glasses
Step 1: Use the broom and wire brush to remove loose concrete and debris from the crack and area surrounding it.
Step 2: To fill in narrow cracks, apply masonry crack filler using the caulk gun. An alternative is vinyl concrete patching compound applied and then smoothed using a putty knife. No bonding agent is required when using this patching compound.
For wide cracks:
Step 1: Put on the long pants, long sleeved shirt, safety glasses, and gloves. Undercut crack edges using the chisel and sledge hammer. This makes the crack wider at its base than its surface, allowing the repair to be more secure and last longer.
Step 2: Use the broom and wire brush to clean in and around this crack. Apply water to wash the area.
Step 3: Mix the vinyl concrete patching compound according to the manufacturer instructions. Use the trowel to apply the compound to the crack. Tamp the compound to remove any air pockets. You can also use patching mortar mixed with a bonding agent (not water) or coat all edges with the bonding agent and then apply the patching mortar.
Step 4: Use the trowel to smooth the mixture.
Step 5: Follow the manufacturer instructions to let the patch set. Brush or smooth the surface so it matches the surrounding area.