D2 Biological Solution

D/2 Biological Solution: A Comprehensive Guide

D/2 Biological Solution is a biodegradable, easy-to-use liquid designed to remove stains caused by mold, algae, mildew, lichens, and air pollutants. This effective cleaner works on various surfaces, including marble, granite, limestone, brownstone, travertine, masonry, terra cotta, concrete, stucco, wood, canvas, vinyl, and aluminum siding, as well as architectural surfaces such as monuments, sculptures, and headstones. A simple application with a 10 to 15-minute contact time followed by scrubbing with a soft nylon or natural bristle brush will loosen most stains.

Why Choose D/2?

No Harmful Residue Deposits

D/2 was developed by conservators who understand the damage caused by cleaners containing acids or salts. This product is formulated without these harmful agents, making it nearly pH-neutral. The quaternary ammonium solution with surfactants effectively carries surface contaminants away, making it a trusted choice among architectural and monument conservators.

Versatile Surface Compatibility

D/2 successfully removes stains from various surfaces, including:

• Natural stones: marble, granite, limestone, sandstone, slate
• Masonry surfaces: brick, cast stone
• Concrete
• Wood
• Aluminum and vinyl siding
• Canvas

Proven Effectiveness

D/2 is a proven solution that has cleaned millions of buildings and monuments, including the White House and Arlington Cemetery. It is trusted to deliver reliable results when they matter most.

Packaging and Coverage

D/2 Biological Solution is available in:

• 1 quart
• 1 gallon
• 5 gallon containers
• 55 gallon drums (contact for availability and shipping information)

The coverage area for one gallon of D/2 varies based on the extent of biological deposits and the surface’s physical characteristics. Typical coverage for medium deposits ranges from 250 to 350 square feet per gallon. D/2 works best at temperatures of 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. Results appear within one week to one month, depending on the severity of soil.
3. Reapply if rain occurs within 12 hours of application.

Immediate Results Method

1. Apply D/2 with a brush, roller, or sprayer.
2. Let the undiluted D/2 remain on the surface for 5 to 10 minutes.
3. Apply additional D/2 to keep the surface wet.
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 the initial treatment, a yearly light spraying will help maintain a clean, stain-free surface. For heavy biological deposits, repeat applications may be necessary. Alternatively, heavy growth can be detached manually using wooden or plastic tools immediately after application. In case of excessive plant exposure, rinse all plants and water-in all planted ground areas contacted by D/2.