Aqua Mix STAIN is a concentrated semi-opaque stain designed to change the color and enhance the natural texture of porous adobe clay tile. May also be used as a pre-grout coating to protect tile from grout staining when used a minimum of 2 hours before grouting. Allows moisture vapor transmission. Uses: Use on Saltillo, Adobe, Terra Cotta and other porous clay tiles. Equally effective for interior and exterior applications. Coverage: Approximately 50 to 400 sq. ft. per coat per pint, depending on type of tile, porosity and texture of surface, method of application and dilution ratio.