D/2 is used by the VA to clean over 3.5 million headstones each year
Researchers studied five different cleaners on stones located in five different climates at locations across the United States. Microbiologists at Harvard University evaluated samples for regrowth of microorganisms including bacteria, fungi, and algae. D/2's quaternary ammonium solution came out on top!
The U.S. Department of Veterans Affairs is tasked with the regular maintenance of more than 3.5 million white marble headstones nationwide. Based on recommendations resulting from a six-year study conducted by the National Park Service, D/2 has been selected as the preferred cleaner for maintaining these memorials to our country's fallen heroes.