Unsupported video playback Homeowners FAQ “What is the best concrete crack filler?” The answer depends on how wide the crack is and whether it is moving. For cracks up to half an inch wide on horizontal surfaces, Quikrete Crack Seal is the easiest solution, you simply pour latex repair fluid into the groove, where it dries to the natural color of the concrete. Because it is liquid, it is self-leveling. For horizontal and vertical applications, Quikrete Advanced Polymer Concrete Sealant is a good fit. It is applied from a caulking tube and is sealed and water resistant with a textured finish that blends directly with concrete surfaces. It’s snag-free in just 60 minutes while still being flexible. For deep cracks that don’t move or capillary cracks, Quikrete FastSet Concrete Crack Repair is a good choice, the two-part quick-drying repair comes in one cartridge with low viscosity, so it penetrates deeply into cracks. Levels and suitable for crevices from hairline to 1 inch wide. more than a decade. His extensive work experience and understanding of the industry make him the go-to resource for all things home – from advice on minor repairs, to complete remodels, to helping homeowners prepare their homes for inclement weather and seasons.