Slab is the concrete crack repair sealant you have been waiting for. Some concrete repair products are tough, but don't stick, while others are flexible but don't last. Slab combines the durability, flexibility and adhesion you need for lasting concrete crack repairs. This easy-to-apply, 100% acrylic latex water-based product is textured to simulate concrete so repairs blend in. Plus, slab contains no isocyanates or solvents, which means it's easy on your nose and on our planet.