No garage or tool shed is quite complete without a supply of this Sikacryl ready-mix concrete and cement patch. It's the premiere solution for unsightly cracks and spalls in foundations, patios, balconies, steps, masonry, driveways, sidewalks and more. You only need a putty knife or trowel to apply it and some water to clean up afterwards. In a few hours your patch will set, and in a day or so, it will cure (the exact timing depends on factors like atmospheric temperature and humidity). It works on both vertical and horizontal surfaces. For cracks and spalls deeper than 1/4-in., two or more applications should be made.