What a pleasure it was working with Kenny and Mark. The concrete deck around our pool (about 1600 sq ft) was very slippery. We had to use rug runners and mats to keep from falling. Literally National Sealing saved the day for us. The non-slip coating is very comfortable to walk on but still provides plenty of traction. The rugs and mats have been put away. In addition, we have color concrete and the coating did not affect the color in any way. We are very happy with the results that National Sealing promised, and then delivered.