D/2 Biological Solution is specially formulated to remove environmental pollution, dirt, and staining from biological soils such as mold, mildew, lichen, and algae from indoor and outdoor structures. It cleaned the headstone reasonably well but almost a year later we went to visit (we live abroad) and it looks as though it has been cleaned professionally. By examining its ingredients, ingredient proportions, and ingredient combinations, we can better understand its true effects and the consequences of these effects. The cemetery irrigates using sprinklers which when the water dries on the monuments there is a white deposit that builds up.

NOTE: Heavy biological deposits may require repeat applications of D/2 to achieve complete cleaning after detachment.To prevent such releases into the atmosphere, growers use various tractor-drawn knives and shanks to place it at least 10 to 20 cm (4 to 8 inches) below the soil surface. D/2 Biological Solution is effective and safe for a wide range of masonry and architectural surfaces, including render, coloured render, concrete, brick, cast stone, aluminium, vinyl sliding, canvas and wood. My rule of thumb for which brush to use: if you wouldn’t use it on your body, don’t use it on a gravestone! You don’t have to take much time to spray the solution – it might take 1-2 minutes for a typical headstone, and working faster is actually better.

Manmade elements can range from a wide variety of atmospheric pollutants and acid rains, to any sort of carry over used in the farming industry, from fertilizers to pesticides. Take a DURING photo here to illustrate progress after the first scrub (no solution yet, just demonstrating every step of physical cleaning). Information and statements about products are not intended to be used to diagnose, treat, cure, or prevent any disease or health condition.

Ammonia has the highest N content of any commercial fertilizer, making it a popular source of N despite the potential hazard it poses and the safety practices required to use it. A contact time of only 10 to 15 minutes followed by scrubbing with a soft bristle scrub brush will loosen most biological and air pollutant staining.

I don’t want to be “that guy” and complain, but some cemeteries are poorly maintained and it can make someone very sick to go “graving” – documenting, photographing, and general cleanup of graves. This cleaner is in the top two most recognized and recommended biocides among cemetery conservators and people in the field of stone preservation. Aqua ammonia doesn’t need to be injected as deeply as NH3, which provides benefits during field application and has fewer safety considerations. The Gravestone Cleaning Kit contains all of the proper tools necessary for cleaning gravestones safely and efficiently. D/2 is a proven solution that has been successfully used to clean millions of buildings and monuments.Quote: “The NCA entered into an agreement with the National Center for Preservation Technology and Training, NPS, to evaluate marble cleaners in an effort to minimize damage to historic headstones.