D/2 Biological Solution is a biodegradable, easy-to-use liquid that removes stains from mold, algae, mildew, lichens, and air pollutants. It is effective on marble, granite, limestone, brownstone, travertine, masonry, terra cotta, concrete, stucco, wood, and other architectural surfaces including monuments, sculpture, and headstones.
**Disclosure – Sizes and colors of some of the items may vary from picture shown and description.