My stamped concrete patio that has a brown/bronze tint to it had become dull and lost some of its color. After applying Foundation Armor Blush treatment followed with two coats of AR500 my patio look like new even though its at least 17 years since its installation. I selected AR500 because its solvent based for longer durability and provided a nice gloss that when the sun hits it makes it sparkle. It was easy to apply with a 3/8" nap roller in my case. I did use a brush to apply between stamped stone "grout lines" and long the stacked stone sitting wall to make sure there was no over splash. I researched may brands and found Foundation Armor to be the most reasonable with great reviews. I would strongly recommend this to anyone. On last point it their customer / technical support is one of the best I have ever engaged. I called a few times with questions and they were very frank and consultative. Their web page is also very good.