Old Masters 71204 Ascend Exterio Waterbase, Clear, Semi-Gloss, 1 qt Can | Ascend Exterior water-based clear finish is a durable coating designed for exterior application on wood, fiberglass, coated metal or painted surfaces. It contains UV absorbers for advanced sun protection and dries quickly and cleans easily with soap and water. Use it on properly prepared exterior surfaces, such as railings, outdoor furniture, above water line marine surfaces, as well as doors (including wood, fiberglass and steel). It can also be used on interior windowsills and door frames for added UV protection. Do not use on wooden decks, steps or fences, log homes or surfaces below the water line.