I noticed my basement floor was wet one winter morning. When I looked I saw water leaking through cracks in my basement foundation wall, during the snow thaw. The contractor came in and injected urethane into the wall. He drilled many holes into the wall and took time and patience to make sure the crack was filled. The contractor was polite and courteous. He had to come in twice because after filling in the crack the first time we saw water leaking again the next day, although much much less. He promptly came back and filled in the crack at the location I observed the water leakage. It's been 10 months and so far no water leakage. Winter will be the big test and I will update this review in the coming months. Overall, I am satisfied with the work done.