Prosurface on decks, sundecks, driveways, patios, pool decks, garage flooring will last indefinitely, but 20-30 years can be achieved easily. On industrial or vehicular applications, the membrane may begin to wear down after heavy traffic, but even then you will get at least 10 – 15 years out of the membrane before any repairs or re-top coating is required. The longevity of our product is why it is so easy for us to warranty the product and for our dealers to warranty their workmanship.