Sikkens Cetol Marine quartSikkens Cetol Marine is a durable translucent satin protective wood finish for interior and exterior use on boats. Cetol Marine provides a flexible breathable finish, superior ultraviolet and weathering protection for teak and other woods commonly found on boats, or as a priming coat only when used with Cetol Marine Gloss. Please note that Cetol Marine may not be used below the waterline.