Okon OK940 Seal and Finish Concrete and Masonry Sealer, 5-Gallon Pail A clear, low-gloss finish seals and protects new or existing, interior or exterior horizontal concrete It can also be applied over or under other concrete coatings or as a protective layer over concrete stains Seal & Finish does not require acid etching and can be touched up or recoated with simple surface preparation Multiple coats will produce a semi-gloss finish Seal & Finish can be tinted with up to 2 ounces of universal colorant to simulate the appearance of stained concrete