Custom Building Products Aqua Mix Sealer's Choice Gold Grout & Tile Sealer is a premium, no-sheen, natural-look, water-based penetrating sealer designed to provide maximum stain protection, especially in food preparation and serving areas. Featuring a new Rapid Cure Formula, it protection in less than 4 hours and can also be used as a pregrouting sealer. This versatile sealer is suitable for all porous tile and natural stone surfaces such as marble, granite, slate, travertine, and limestone, as well as some porcelain, quarry, Saltillo, terra cotta, cement pavers, masonry surfaces, and other porous tile and grout where a natural appearance is preferred. It allows moisture vapor transmission and is formulated to achieve optimal penetration into dense, low-porosity surfaces. I for both interior and exterior applications, this 24 oz. bottle covers 300 to 1500 square feet per gallon and has a shelf life of 24 months.