I have 12+ year old colored stamped concrete. The product was easy to use and the results were excellent. The smell of the product is rather strong, so be prepared to have neighbors come by wondering what you are doing. Be sure to brush excess sealer from crevices...although it does dry clear and not cloudy if it pools a bit....so looks ok. I have tried many products and I like the results of this one the best. We will see about longevity...but I am hopeful.