High quality silicate paints for more than 120 years

D/2 Biological Solution

D/2 Biological Solution

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, canvas, vinyl & aluminum siding 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.

Why Choose D/2

No harmful residue deposits
D/2 was developed by conservators who know the damage that can be done by cleaners containing acid or salts. Our product has been specially formulated without these harmful agents. D/2 is a nearly pH-neutral quaternary ammonium solution with surfactants that help carry surface contaminants away. No other solution is more trusted by architectural and monument conservators.

Can be used on a variety of surfaces
D/2 has been successfully used to remove staining from a variety of surfaces including natural stones such as marble, granite, limestone, sandstone, slate; masonry surfaces such as brick and cast stone; concrete; wood; aluminum and vinyl siding; and canvas.

It works! 
D/2 is a proven solution that has been successfully used to clean millions of buildings and monuments. From the White House to Arlington Cemetery, D/2 is trusted to work and keep on working when results matter.

Packaging and Coverage

D/2 Biological Solution is available in 1 quart, 1 gallon and 5 gallon containers, and 55 gallon drums. (For the 55 gallon drum size, please contact us for availability and shipping information)
The area that can be treated with one gallon of D/2 will vary considerably as a function of the nature and extent of biological deposits, as well as the physical characteristics of the surface. Typical coverage to remove medium deposits will vary from 250 to 350 square feet per gallon. D/2 works best when used at 45 degrees F or above.

Methods For Use

  • No Scrub/No Rinse Method  
  1. Using a sprayer (pump-up, low pressure, or other,) wet the entire surface with D/2.
  2. Allow to air dry. D/2 works with the elements and results occur within one week to one month, depending on severity of soil.
    Reapply if rain occurs within 12 hours of application.
  • Immediate Results Method    
  1. Apply D/2 with a brush, roller, or sprayer.
  2. Allow the undiluted D/2 to remain on the surface for 5 to 10 minutes.
  3. Apply additional D/2 to maintain a wet surface.
  4. Scrub the surface thoroughly with a non-metallic, short fiber scrub brush.
  5. Lightly mist with water and continue scrubbing.
  6. 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 D/2 to achieve complete cleaning after detachment. Alternatively, heavy growth can be detached by manual scraping using wooden or plastic tools immediately after application. In the event of excessive plant exposure, rinse all plants and water-in all planted ground areas contacted by D/2.

Download the safety data sheet and d/2 data sheet PDF files.

PURCHASE D/2 Biological Solution:

55 gallon D2 Biological Solution.jpg

D/2 Biological Solution - 55 Gallon Drum
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Please contact us for purchasing and shipping information!