Old Masters 71104 Exterior Water Based Clear Finish 1 qt Can, Satin | Ascend exterior water-based clear finish is a durable coating designed for exterior application on wood, fiberglass, coated metal or painted surfaces. It contains ultraviolet 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 waterline marine surfaces, as well as doors (including wood, fiberglass and steel). It can also be used on interior windowsills and door frames for added ultraviolet protection.