I’m not sure if it was intended for concrete floors but is works great. I have a rough concrete floor in my crawl space and this brush handled it like a champ. I got great coverage for a one coat job and the work went very fast. I used a roller on the smooth surface of the floor in the storage areas of my basement. I plan on using this to apply concrete paint to the pitted floor of my garage. Two years ago I used this brush to repaint my wood deck and it works just as well on that surface. In my opinion, this brush is worth every dime.