I used AR350 Sealer on my artcrete back porch which hadn't been sealed since original installation approx. 15 years ago. After researching and reviewing several products online, Foundation Armor's product description and customer comments led me to ordering AR350. The sealer was easy on (I used a 3/8" nap long handle roller) and the immediate wet look was inspiring. I am a 76 year old woman, so if I can do it, so can you! The product went further than anticipated as my porch was not very porous. Wish I had found this product ten years ago!