I applied this to a stamped concrete driveway that had last been sealed 5 years ago.  The previous finish had faded and discolored.  After applying the AR500 finish, the driveway looked as it had 5 years ago!  I love the high gloss, wet look.  Application was easy, I used an 18" roller and gave it 2 coats.  I have already recommended it to a friend, and will be purchasing the AR350 to apply to my paver sidewalk and patio myself.