Slab is a serious fix for concrete cracks. It is the first concrete crack repair caulk to combine ideal performance in both adhesion and elasticity, leading to superior durability. It easily outlasts other concrete crack repair products by sticking, stretching, and staying. Its water-based formula is easy to apply and clean up. It’s colored to match most concrete and lightly textured so repairs are not only durable but blend in, too. Also, it contains no solvents or isocyanates, which means it is earth- and nose-friendly. Sashco. 800-767-5656.