Biodegradable formula: Environmentally friendly and safe for use around plants and the environment
Removes mold, algae, mildew, and lichens: Effectively tackles common organic stains on surfaces
Targets air pollutants: Cleans away harmful biological and airborne contaminants
Fast-acting action: Loosens stains in just 10 to 15 minutes with minimal scrubbing
Versatile application: Suitable for masonry, marble, wood, stucco, concrete, and more
Summarized by Shop
Size: 1 Gallon
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
Superior product, from a professional company.
Have used this product for gravesite cleaning.
The results have been very, very good.
Highly recommend.
P
Peter · June 16, 2026
Works great! Use as directed. I love this product!
H
Hunter · August 12, 2026
This product is unbelievable. The difference in our family gravestones is incredible and they are still getting better with the residual effects. I highly recommend.