I used this sealer on my 25 year old stamped concrete patio. The sealer I previously used is no longer made so I carefully shopped around before choosing this one. I applied the sealer with a 3/8" nap roller that was 18" wide. It went on smoothly even over the bumpy, textured surface of the stamped concrete. The portion of the patio I covered is 900 sq. ft. I was pleasantly surprised to see that a single gallon of sealer cover around 750 sq. ft. of the patio. I will definitely used this product again and will be recommending it to my friends who use sealer on their patios.