Waterlox Medium Sheen Wood Seal/Finish. Quart. Works as a sealer, primer, tie-coat or paint additive to improve adhesion. Formulated as a traditional interior penetrating Tung oil finish, non-toxic when dry/fully cured and easier to maintain than other interior clear finishes or surface finishes. For use on all interior wood surfaces, for wood floors, wood countertops, fly rods and more.