Our backyard patio is a simple concrete slab. We appreciate its clean look and have furnished it with an outdoor rug and patio furniture, but a few unsightly cracks have appeared over time. Using Sakrete Concrete Crack Filler has helped stop those cracks from widening by preventing water from penetrating the openings and eroding the base under the slab, which can cause settlement and create a tripping hazard.
Concrete cracks are common and can occur in many climates. They are particularly frequent in regions that experience freezing weather and snow. When water gets into small fissures and freezes, it expands and forces those cracks to widen. Poor mixing—especially using too much water—can also weaken concrete and make it more likely to crack as it cures.
A single crack in concrete doesn’t automatically mean you need to demolish the slab, but repairing it promptly will reduce the chance of further damage. Sakrete offers a variety of concrete and cement repair products designed for DIY use on patios, driveways, and sidewalks. For the smaller cracks that appeared on our patio, Sakrete Concrete Crack Filler proved to be an appropriate and easy-to-use solution.
Begin the repair by removing any loose debris from the crack with a brush or broom. Make sure the crack is clean and completely dry before applying any product. Shake the Sakrete Concrete Crack Filler bottle vigorously before opening. Trim the applicator tip to approximate the width of the crack—start conservatively and cut back more if needed.
To apply, run the tip of the bottle along the length of the crack while squeezing to fill the void. Smooth or remove excess filler with a plastic putty knife. This product is intended for cracks up to 1/2 inch wide and up to 1/4 inch deep. Allow the filler to cure overnight and inspect the repair the next morning. Some shrinkage during curing is possible; if the filler pulls back below the surface, reapply as necessary to achieve a flush finish.
While the crack filler is curing, protect it from rain or water for at least 24 hours. Once fully cured, the repair will block water penetration and help prevent further erosion beneath the slab. If you have many repairs to complete and are unsure how much product you’ll need, use Sakrete’s concrete calculator to estimate quantities—this can save money and avoid wasting material.
Another useful product from Sakrete is their Polyurethane Self-Leveling Sealant. It’s formulated to repair cracks or fill joints on horizontal surfaces where a smooth, flush finish is required. Applied with a caulking gun, the sealant levels itself and remains tacky for up to eight hours, with full cure taking seven days. You can safely walk or drive on it after about 24 hours. The cured sealant accepts latex paint, making it a practical option when appearance matters.
If your concrete issues are more extensive than a few small cracks, Sakrete’s product line includes mixes and repair systems for larger jobs. They provide instructional videos and product guides that walk you through proper application for each material. Using the right product and following the manufacturer’s directions is key to a durable repair.
This article reflects the author’s experience using Sakrete products. The recommendations are based on those hands-on results and on following the product instructions to achieve reliable repairs.