Description
D/2 Biological Solution is a biodegradable, professional-grade cleaner formulated to safely remove mold, mildew, lichen, algae, and air pollutant staining from indoor and outdoor surfaces. Developed by conservators for conservators, D/2 has been trusted for decades on historic landmarks and monuments—including the White House and Arlington National Cemetery—making it the industry standard for architectural and monument restoration.
Key Features & Benefits
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Fast-acting performance – Visible cleaning in as little as 10–15 minutes with brushing
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Biodegradable & pH neutral – Safe for the environment and non-toxic to plants and wildlife
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No harsh chemicals – Contains no bleach, salts, acids, or solvents
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Non-corrosive – Will not etch glass or metal surfaces
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Easy to use – Ready to apply with no mixing required
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Long-lasting results – Works immediately and continues cleaning over time
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Proven track record – Specified by the U.S. Department of Veterans Affairs for headstone maintenance
Common Applications
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Cleaning monuments, headstones, and sculptures
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Restoration of historic buildings and landmarks
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Removing stains from siding, roofing, and outdoor structures
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Maintenance for stone, concrete, and masonry facades

Compatible Substrates
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Natural stone: granite, marble, limestone, sandstone, slate, travertine
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Masonry: brick, brownstone, terra cotta, cast stone, stucco, concrete
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Wood, aluminum, vinyl siding, fiberglass, canvas, plastic, and asphalt roofing
Technical Specifications
| Property | Value |
|---|---|
| Physical Form | Transparent, low viscosity liquid |
| Color | Almost colorless |
| pH | 9.5 |
| Specific Gravity | 1.01 g/cc |
| Solubility in Water | Complete |
| Vapor Pressure | 25 mm Hg @ 20°C |
| Shelf Life | 5 years |
| Typical Coverage | 250–350 sq. ft. per gallon (medium deposits) |
Compliance & Safety
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Biodegradable and non-hazardous
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Zero VOC formulation
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Non-mutagenic and contains no carcinogenic compounds (per NTP, IARC, OSHA)
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No special handling or ventilation required
Packaging & Ordering Information
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Quart (individual or case of 12)
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Gallon (individual or case of 4)
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5 Gallon Pail
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55 Gallon Drum (available by request)
How to Use
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Immediate Results Method: Apply undiluted, allow 10–15 minutes dwell, scrub with a soft brush, rinse.
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No-Scrub Method: Apply to dry surface and allow natural weathering to clean over time.
Trusted by Conservators Worldwide
No other cleaner is more trusted by conservators. Whether restoring a national monument, cleaning cemetery headstones, or maintaining architectural stone, D/2 Biological Solution delivers safe, long-lasting results without damaging delicate surfaces.
Order D/2 Biological Solution today from Chemical Concepts for proven, professional-grade monument and architectural cleaning. For bulk orders, technical support, or contractor pricing, call 800-220-1966 or email [email protected].



























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