Materials & Products
Is D/2 Biological Solution Safe for Headstones?
Quick answer
Yes. D/2 Biological Solution is a non-ionic, non-acidic cleaner developed specifically for stone, masonry, and cemetery monuments. It's widely used by conservation professionals because it doesn't contain bleach or harsh acids, won't harm surrounding grass, and breaks down biological growth like lichen and algae gradually rather than forcing it off.
What makes it different from a household cleaner
Most household cleaners are designed to work fast and rinse away completely. D/2 works differently — it's applied, left to sit, and allowed to continue working on biological growth over days or weeks as it's exposed to rain and sunlight. This slower action is intentional: it lifts organic staining without the aggressive scrubbing or harsh chemistry that damages stone surfaces.
Why preservation professionals rely on it
D/2 is pH-neutral and doesn't contain the chlorine bleach, ammonia, or acids found in many general-purpose cleaners. That matters because those ingredients can react with minerals in stone — especially marble and limestone — causing discoloration or a rough, etched texture that gets worse with each use. D/2 also breaks down without leaving a harmful residue in the soil, which matters on cemetery grounds where grass and landscaping surround every marker.
How it's typically used
The stone is wetted, D/2 is applied and allowed to dwell, and any visible growth is loosened with a soft brush rather than scraped off. For heavy lichen or moss buildup, a second application weeks later is often more effective — and safer — than trying to remove everything in one aggressive pass.
Sacred Stone uses conservation-grade cleaning solutions exclusively — never bleach, acid, or abrasive tools.
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