I used this on my concrete driveway about 9 months ago. I was tired of the expense of pressure washing my drive every year. Not only is it expensive, but it causes the driveway to deteriorate a little each year. This time I used the V-100 series a few days after I pressure washed the drive. Wow! it’s really amazing. All my neighbors driveways need cleaning again and mine looks like I just pressure washed it.