D/2 Biological Solution


D/2 Biological Solution is a specially formulated biological cleaner that removes environmental pollution, dirt, and staining caused by mold, mildew, lichen, and algae. D/2 Biological Solution is ideal for use on indoor and outdoor surfaces.

D/2 Biological Solution 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.


  • Fast acting
  • Contains no bleach, salt, solvents, or acids
  • pH neutral and Zero VOC formula
  • Will not etch metal or glass
  • Biodegradable and safe for use around plants and wildlife
  • Can be used on a variety of surfaces
  • Easy to use, no mixing required
  • Available Sizes: Quart, Gallon, 5 Gallon, Drum


  • Cleaning headstones and monuments
  • Cleaning outdoor structures and surfaces
  • Restoration cleaning
  • Can be used on a masonry, stone, concrete, marble, granite, and limestone wood, asphalt shingles, vinyl and aluminum siding, fiberglass, metal and canvas


SDS/TDS available upon request at [email protected]

Additional information

Weight N/A
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 minutes • 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


Quart, Quart Case (12), Gallon, Gallon Case (4), 5 Gallon Pail

Treatment and Maintenance Products

Note: Heavy biological deposits may require repeat applications of D/2 cleaner to achieve complete cleaning after detachment. Alternatively, heavy growth can be detached by manual scraping using wooden or plastic tools immediately after application.