BNL25 is a ready-to-use stone sealer cream based on emulsified silane-siloxane for mineral surfaces, such as masonry facades. After use, the product is invisible, highly water-repellent and remarkably durable. BNL25 reacts with the surface and bonds closely to mineral substrates. It penetrates into porous brickwork and forms a highly hydrophobic, weather-resistant seal. This sealer was specially developed to allow for high-quality application with a brush and a roller; it bonds well, without dripping from the brush or roller.