TileLab(R) grout sealer is a ready-to-use, water-based, penetrating sealer that resists most common oil and water-based stains. With a 360 nozzle, it is a quick and easy way to apply a sealer to sanded or non-sanded grout while in a standing position. The steady stream from the nozzle and the foaming action of the sealer makes it easy to aim and seal. Grout sealer makes cleaning easier.