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We have chosen to use D-2 Biological Solution over any other type of cleaner or practice to clean tombstones & monuments. This product is highly accredited by the preservation community & is in use world-wide.


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D-2 is not always a product that will yield instant results but, over an average of 3 months you will see a noticeable change.

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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. A contact time of only 10 to 15 minutes followed by scrubbing with a soft nylon or natural bristle brush will loosen most biological and air pollutant staining.

D/2 Biological Solution is effective for removing harmful biological and air pollutant staining from many building materials including masonry, marble, granite, limestone, brownstone, travertine, terra cotta, concrete, stucco, wood, canvas and vinyl & aluminum siding.

NCPTT study recommends D/2 for cleaning government headstones.

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!

D/2 awarded Veterans Administration contract to supply cleaner for over 3.5 million headstones.

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 maintaing these memorials to our country’s fallen heros.

Civil War monuments get D/2 makeover at Chickamauga battlefield. A six-person preservation team with the National Park Service has been working its way around the Chickamauga and Chattanooga National Military Park giving its Civil War monuments a spring cleaning. The crew, which works out of Frederick, Md., and travels the country to clean monuments, will work at the park for about three months. The group uses the environment friendly cleaner D/2 to clean the structures.


New Architectural Product Rep for New York and New England

D/2 Biological Solutions is delighted to announce the selection of a new architectural product representative for New York and New England: Patrick J. Morrissey, BSCE, has agreed to join our team of experienced professionals. Pat is more than a civil engineer and President of ConSpec Associates, Inc., he’s one of the first professionals to use D/2 and has been an avid supporter ever since! First introduced to D/2 in the early 1990s by Norman Weiss, Ted Kinnari, and Irving Slavid, D/2 has become the go-to cleaner for important projects the world over.

Pat brings to the table a rare level of expertise that only comes from years of experience in the industry. He has been involved in many major historic preservation projects throughout out the North East, including the Empire State Building, Chrysler Building, Block Island Light House, Ellis Island, Grand Central Terminal, and the Woolworth Building just to name a few. Pat is also active in several ASTM committees, serves on the board of the Association for Preservation Technology, and is a National Board member and Fellow of the International Concrete Repair Institute.