TexProtect SDS 15 Surface Defense Penetrating Sealer is a clear, water-based liquid sealer with state-of-the-art performance. It penetrates the substrate to provide lasting protection from within the finish. The TexProtect SDS will help prevent stains. It has outstanding water and dirt repellent properties, and prohibits organic growth. This sealer is zero VOC emitting and will perform at a level previously attained only by caustic products. It leaves a natural look without changing the color or sheen of the finish.