My concrete driveway was sinking in numerous areas. Lifting some of these sunken areas was made difficult by my heavily cracked concrete. The crew didn't give up until each problem area had been properly lifted. When the lifting was finished, they sealed all the cracks. The rock & sand mixture that was embedded into the Nexus Pro caulking made the caulking almost disappear. My driveway looks almost new! I was really impressed by how much pride the entire crew took in their work.