In most cases, cracks appear when a part of the slab settles or sinks into the soil beneath it. Moisture then gets in and can cause more soil to soften and cause cracks to get even larger. To prevent these problems, the cracks and joints must be sealed correctly. DIY and over the counter sealants just don’t work long term. Our sealants and method of repair have been proven to work. We repair all types of cracks in concrete-driveways, walkways, pool decks, patios and more.