PLUS is a clear, penetrating, water and oil repellant. Ideal for long term protection against food, oil, and water stains. PLUS dries clear and non-glossy and does not form a surface film. Treated surfaces retain a natural appearance. PLUS: preserves original beauty of the surface, inhibits efflorescence, penetrates deeply and immediately, and is an excellent grout release. Use on any stone surface when a natural look is desired. For interior or exterior use. FOR USE ON: Flagstone, Shell or Fossil Stone, Limestone, Quarry Tile, Slate, Keystone, Brick, Brick Pavers, Unglazed Ceramic Tile, Clay Tiles, European Clay Pavers, Concrete, Grout Joints, Saltillo Tiles, and any stone surface where no gloss is desired.