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D/2 Biological Solution


D/2 Biological Solution is an easy to use liquid that is ph neutral and contains no salts, bleach or acids. It’s been tested and recommended by the Department of Veterans Affairs, The National Center for Preservation Technology and Training, and The Association for Gravestone Studies. It’s highly effective for removing stains caused by mold, mildew, lichens, air pollutants and algae that you might find on sculpture, monuments and headstones. It works best when used at 45 degrees or above.

Before cleaning a stone with biological growth, always wear a mask and use rubber gloves. You don’t want to affect your health in any way. Before applying D/2 you want to remove high growth by using a wood shim. Most will come off quickly.


There are two methods for using D/2. First you can get immediate results by spraying on D/2 and let remain for about 10 minutes. Apply additional D/2 to maintain a wet surface. Use a soft fiber scrub brush, lightly misting with water as you scrub. Rinse thoroughly with fresh water, using a hose or pump sprayer.

The second method is even easier. If you are unable to scrub or you don’t care if you see immediate results. Place your D/2 in a pump sprayer and wet the entire surface and allow to dry D/2 works with the elements and you will see results in one week to one month. The stone will lighten over time. You may re-apply if needed.


After initial treatment a light spray once a year will help maintain a stain free surface. If the stone shows signs of chipping, scaling, flaking or other forms of deterioration, leave it as is. You will do more harm then good. . In the event of excessive plant exposure, rinse all plants and water-in all planted ground areas contacted by D/2. You may view the material safety data sheet here: is the national leader of environmentally friendly masonry preservation products and is now the architectural distributor of D/2 Biological Solution.

If you order from them at and use “saveagrave” as your coupon code you will receive a discount.

Porcelain Memorial Plaques

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