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. Do not use on wooden decks, steps or fences, log homes, or surfaces below the waterline.