Can I Pressure Wash A Headstone?

Can I Pressure Wash a Headstone? What Cemetery Experts Actually Recommend

Quick summary: No — pressure washing a headstone is strongly discouraged by cemetery preservation experts and the National Cemetery Administration, since high-pressure water can erode inscriptions, force moisture into hairline cracks, and accelerate long-term stone deterioration. This Pressure Wash Tips guide covers exactly what to use instead, what real people who’ve actually cleaned family headstones report, and how the same gentle principles apply to washing natural stone floors.

Can I Pressure Wash a Headstone?

No — pressure washing headstones is strongly discouraged by cemetery preservation experts and the National Cemetery Administration, which explicitly advises against power washing government-furnished headstones and markers. Many headstones, especially older ones, are more fragile than they appear; high-pressure water can erode inscriptions, force moisture into hairline cracks, and accelerate long-term deterioration, particularly on marble, limestone, and sandstone. The recommended approach instead is a gentle rinse with plain water, followed by a specialized biological cleaner applied with a soft natural-bristle brush — never a hard or metal brush, and never bleach or acidic cleaners. If a stone sounds hollow when tapped, or shows visible flaking, stop entirely and consult a professional conservator, since the goal of headstone cleaning is to preserve the stone, not make it look brand new.

This isn’t a niche opinion — it’s the consistent, near-universal position across every state and preservation body that publishes headstone care guidance. Utah’s state cemetery program lists power washers directly on its “do not use” list alongside bleach, right next to plastic scrapers and soft-bristle brushes on the “do use” side (Utah Division of State History). South Carolina’s State Historic Preservation Office guidance goes further, specifically warning that fragile, deteriorating stones shouldn’t even be scrubbed by hand, let alone blasted with pressure — recommending instead a slower method of wetting the stone, letting it dry, then applying a biological cleaner and simply waiting months for the growth to die off on its own (SC SHPO).

What to Use Instead: The D/2 Method

The product named repeatedly across state cemetery programs, historical societies, and Arlington National Cemetery’s own published practices is D/2 Biological Solution — a biocide-and-surfactant cleaner specifically formulated to kill and lift mold, algae, lichen, and air-pollutant staining without acids, bleach, or salts that would otherwise damage soft stone (Utah Division of State History).

The process is consistently described the same way across every official source:

Wet the stone with plain water first — never a power washer.
Spray D/2 Biological Solution across the entire surface, including carved lettering.
Let it sit for 10–15 minutes.
Scrub gently with a soft natural-bristle or nylon brush, never metal or stiff plastic.
Rinse periodically with water — there’s no need to reapply D/2 once it’s on.

One detail worth knowing before you start: don’t panic if the stone briefly turns pink, orange, or red. That’s simply the biological growth dying and changing color as it breaks down — a normal, expected part of the process, not damage (SC SHPO).

For granite specifically dealing with hard water mineral staining rather than biological growth, a separate product called Haze Out (a brick and tile cleaner) is sometimes recommended — but with an important caveat directly from Utah’s own guidance: Haze Out is slightly acidic and should only be used on granite, since it will damage softer stones like marble, sandstone, and limestone (Utah Division of State History).

What Real People Actually Experienced

Beyond official guidance, genuine customer reviews from people who’ve used D/2 on their own family headstones offer a consistent, believable picture of what to actually expect. One reviewer described a badly neglected family stone in another state, sprayed with D/2, left for 15 minutes, scrubbed with a soft deck brush, and rinsed — reporting the stone looked “90% better” immediately, with a second application expected to finish the job entirely (eBay verified review). Another reviewer, specifically cleaning a white marble headstone from 1966, reported it hadn’t looked that good since it was new, and — matching the “don’t expect instant results” warning above — noted the stone actually kept getting cleaner as more time passed after application (eBay verified review).

A separate reviewer who’d tried other products first without success switched to D/2 specifically after hearing Arlington National Cemetery uses it, and reported their family headstones “look brand new” without requiring much effort at all (eBay verified review). Multiple additional Walmart reviewers echo the same pattern — one describing a stone so blackened the engraved information was becoming hard to read, resolved entirely by spraying D/2 and simply letting it work (Walmart verified review).

How to Wash Stone Floors Using the Same Principles

The core lesson from headstone care — gentle chemistry over brute force — applies directly to how to wash stone floors made of marble, limestone, travertine, or granite indoors or outdoors. Natural stone flooring shares the same vulnerability profile as a headstone: porous, prone to etching from acidic cleaners, and easily scratched by anything abrasive.

For routine stone floor cleaning, a pH-neutral stone cleaner and a soft mop or brush handle the vast majority of dirt and grime safely. For biological staining specifically — algae or mildew on an outdoor stone patio or walkway — the same D/2-style biological cleaner used on headstones works just as well, since the underlying stone chemistry doesn’t change based on whether it’s vertical or horizontal.

Avoid vinegar, bleach, and other acidic or high-alkaline cleaners on any natural stone floor for exactly the same reason they’re discouraged on headstones: they degrade sealants and can permanently etch the surface. For a deeper breakdown of safe cleaning solutions on other delicate stone surfaces, see our companion guide on pressure washing detergent and cleaning solutions.

Recommended Products

D/2 Biological Solution (1 Gallon, Professional-Grade) — the product named across every official cemetery preservation source in this article: non-bleach, pH-neutral, biodegradable, and safe on marble, granite, limestone, concrete, and monuments. Check price on Amazon →

D/2 Biological Solution with Reusable Spray Bottle (1 Quart) + Cleaning Kit — includes a nylon detail brush and plastic scraper alongside the solution, a genuinely convenient all-in-one option for a first-time headstone cleaning. Check price on Amazon →

Soft Natural-Bristle Cleaning Brush — every source in this guide specifies soft bristles only; a dedicated soft brush prevents the temptation to reach for something stiffer when a stain resists on the first try. Search current listings on Amazon →

Note: as an editorial team, we haven’t independently tested every listed product — these picks are based on consistent recommendations across cemetery preservation authorities and verified buyer reviews. Always check current listings for pricing and availability before purchasing.

Final Checklist

Never pressure wash a headstone — plain water and D/2 Biological Solution, applied with a soft brush, is the standard across every preservation authority.
Expect gradual results, not instant transformation — D/2 continues working for weeks after application.
Don’t panic at pink or orange discoloration — that’s dying biological growth, not damage.
Haze Out is granite-only — it will damage marble, limestone, and sandstone.
If a stone sounds hollow or shows flaking, stop and call a professional conservator.
The same gentle, pH-neutral approach applies to natural stone floors, not just headstones.