Once fully cured, it remains flexible as well as entirely submersible, making it suitable for pool repairs or other areas exposed to water. This product can fill gaps up to 1.5 inches wide with ease on such horizontal surfaces as garage floors, walkways, and patios. Whether it’s a small crack or a wide gap, Sikaflex self-leveling sealant is up to the task. Long curing time compared with some alternative products.Ideal for multiple concrete applications.Ready-made mixture for convenience and user-friendliness.Easy to use simply caulk the sealant into the crack and wait 3 to 5 days.Available sizes: 10.1 ounces and 29 ounces.Our Ratings: Ease of Use 5/5 Cleanup 5/5 Fast Results 3/5 Appearance 5/5 Paintability 5/5 Read on to find out how each product excels and if it might be right for your project. Each was fast and easy to use and left behind a smooth, attractive surface after repairs were complete. We spent 2 weeks researching and testing the following products. Our Top PicksĬoncrete crack fillers can make an unsightly crack a distant memory in just one afternoon. In the reviews ahead, we share our reasons for selecting each product and our observations from testing. We evaluated each product according to ease of use, ease of cleanup, cure time, finished appearance, and paintability, then scored them on a scale of 1 (worst) to 5 (best) in each category. For vertical cracks, we filled cracks in a poured basement wall. Each product filled a minimum of 4 linear feet of cracks, with widths ranging from hairline to ¾ inch. Our tests focused on application locations and methods, tooling requirements, cure time, and paintability.įor horizontal crack tests, we followed the manufacturers’ instructions while patching up cracks in a concrete driveway. ![]() Some repair aesthetic damage, while others are rated for structural repairs. ![]() A few others can be used to repair cracks on vertical surfaces, and most are rated for both indoor and outdoor use. Most of the products we tested were designed specifically for crack repairs in horizontal surfaces, from hairline cracks to openings as wide as 3 inches. Photo: Mark Wolfe for Bob Vila How We Tested the Best Concrete Crack Fillers ALSO CONSIDER: Damtite Waterproofing SuperPatch.BEST SELF-LEVELING: Loctite PL Self-Leveling Concrete Sealant.BEST MULTIPURPOSE: Rust-Oleum Concrete Patch & Repair.BEST FLEXIBLE: Crack Stix Permanent Concrete Joint & Crack Filler.BEST LIQUID: DAP Liquid Cement Crack Filler.BEST EPOXY: PC-Concrete Anchoring and Crack-Filling Epoxy.BEST DRYING TIME: UGL Drylok Fast Plug Hydraulic Cement.BEST FOR THIN CRACKS: Quikrete Concrete Crack Seal.BEST FOR LARGE CRACKS: Red Devil Premixed Concrete Patch.BEST FOR FOUNDATIONS: RadonSeal DIY Foundation Crack Repair Kit.BEST BANG FOR THE BUCK: Sashco Slab Concrete Crack Filler.BEST OVERALL: Sikaflex Self-Leveling Sealant.Based on our testing, here are the best concrete crack fillers for a variety of circumstances. ![]() In the process, we learned that surface orientation, crack size, weather exposure, and other variables can help guide a DIYer’s decision regarding concrete repairs. We researched more than a dozen epoxy, polyurethane, polymers, liquid concrete, and other types, and then tested some of the most highly rated products available. Fillers repair cracks in foundations, driveways, sidewalks, and basement walls, improving the look and longevity of the wall or slab. For the long-term performance and safety of the slab or wall, and to keep the damage from spreading further, it is important to repair any cracks promptly. Cracks can develop for a variety of reasons, including natural causes, physical damage, poor design, and more. Though incredibly stable and durable, concrete is not indestructible, and that’s where concrete crack fillers can make a difference.
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