The iron oxide pigments used in our concrete tile will not fade but the concrete itself can appear faded due to efflorescence, hard water, and other deposits. These can be cleaned but proper sealing at the time of installation will protect against staining and make cleaning much easier. But as they say the proof is in the pudding. These Artillo Cotto Dark tiles have been in stalled for many years in Catalina Island exposed to direct sunlight, salty air, and sandy shoes and butts. They still look great today.