How to Fill Cracks in Concrete

04/24/2020 Foundation

In the construction industry, concrete is known for being a super solid material that can last even for centuries, but that doesn’t mean that it can’t still develop cracks, crevice or holes. Temperature changes, moisture, and ground movement are the reasons behind these cracks. Apart from being a tripping hazard, when your driveway, patio, or walkway concrete has cracks, that lowers the value of your home.

Does your property have concrete cracks that need filling? If yes, hiring a professional to fill them may make sense, but another option that’s pretty easy and time-saving is to do it yourself (DIY). In this easy-to-follow guide, we’ll help you learn how to fill these cracks with ease.


•Concrete repair mix
•Wire brush
•Mason’s trowel
•Protective gear
•Putty knife

STEP 1: Choose your concrete repair filler product.

You cannot use concrete to fill or repair concrete surfaces. The right product to use is a concrete repair mix. You can purchase it at a nearby store or online. Some examples include latex patching material, epoxy compounds, and mortar mixes. If the cracks you want to fill are large or chipped edges, mortar mixes will be your most suitable pick. But if the concrete is ⅛-inch wide or narrower, then the other products are right for them.

STEP 2: Prepare the area that has cracked for filling

Begin by using a small hammer and chisel to knock away the areas of the concrete that has cracked and is crumbling or losing concrete. Chip deep enough to reach a one-inch depth beneath the surface plane. At that point, rinse the area well as you scrub it using a wire to get rid of any loose particles.

Make sure to protect yourself from dust using protective gear. For cleanup, you may have to spread a tarp below the work area.

STEP 3: Fill the concrete crack using your selected product.

Epoxy or latex

If you are filling concrete cracks that are ⅛-inch wide or narrower, get an epoxy or latex patching product to apply on it. Mix it as per the specifications of the manufacturer. Whether you use it with a mason’s trowel or putty knife, it’s all the same. Force the product deep into the cracks and smoothen the level of the product with the surrounding concrete. The effectiveness of each material bases on the way it is mixed. So again, follow the manufacturer’s direction as listed on the product.

Mortar mix

If the cracks on your concrete are larger, fill them with a mortar mix. You won’t find it difficult to create the mix as it involves combining a part Portland cement, three parts masonry sand, and plenty of water to create a thick paste. Or you can as well buy repair mortar mixes at a nearby store or online. Make sure to moisten them but without flooding the cracked area before applying the mortar mix using a mason’s trowel or putty knife. Press down very well to get rid of any air pockets from the product being applied and smoothen patch to flush with the level of the surrounding concrete. Within two hours of curing, lay plastic sheeting on the area so that it stays moist. As you wait for the surface to harden up, keep sprinkling water on it.

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