D/2 Biological Solution


Zero VOC Product

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.  D/2 is the only product developed for conservators by conservators. It has been successfully used to clean millions of buildings and monuments, from the White House to Arlington Cemetery.

Tested in a 6-year study and now specified by the Department of Veteran Affairs National Cemetery Administration.


  • Masonry
  • Stone
  • Concrete
  • Marble, Granite, Limestone
  • Wood
  • Asphalt Shingles
  • Vinyl & Aluminum Siding
  • Fiberglass, Metal, Paint, Canvas, etc.

Product Information

  • Will Not Etch Metal, Glass or Damage Plants
  • PH Neutral
  • Contains No Salts, Bleach or Acids


  • Quart (Each or Case of 12)
  • Gallon (Each or Case of 4)
  • 5 Gallon Pail
  • Drum size also available. To order, please call (800) 425-2214.

D/2 Cleaning Demo

Additional Information


Method for Use

– Apply D/2 with a brush, roller or sprayer
– Allow the undiluted D/2 to remain on the surface for 5-10 min
– Apply additional D/2 to maintain a wet surface
– Scrub the surface thoroughly with a non-metallic, short fibered scrub brush
– Lightly mist with water and continue scrubbing
– Rinse thoroughly with fresh water using a hose or sprayer

Treatment and Maintenance Program

After initial treatment of substrate, a once-a-year light spraying will help maintain a clean, stain-free surface.

Note: Heavy biological deposits may require repeat applications of D2 cleaner to achieve complete cleaning after detachment. Alternatively, heavy growth can be detached by manual scraping using wooden or plastic tools immediately after application.


Quart, Quart Case (12 quarts), Gallon, Gallon Case (4 gallons), 5gal Pail


D/2 Biological Solution

In stock
$18.95 $227.40
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