Natural Stone Care Guide: How to Clean, Seal, and Protect Stone Surfaces

Natural stone is not a install-and-forget material. Sealed and cleaned properly, it lasts decades and looks better with age. Neglected, it stains, etches, and dulls — sometimes in months. The good news: stone care is simple once you know the rules. Here they are.

1. Sealing: the one job that protects everything else

Most natural stone is porous to some degree, which means liquids can soak in and leave stains. A sealer fills those pores and buys you time to wipe up spills before they become stains. It does not make stone stain-proof — it makes it stain-resistant.

• Seal after installation, and again whenever water stops beading on the surface.

• Indoors, most stone needs resealing every 1–3 years depending on use.

• Outdoors and in wet areas (showers, pool decks), reseal more often — every year or two is a safe rhythm.

• Use a penetrating sealer for most stone. It soaks in without changing the look. Topical sealers that sit on the surface can change the finish and peel over time.

If you remember one thing from this guide, make it this: seal the stone, and keep sealing it.

2. Daily cleaning: pH-neutral, nothing fancy

Stone's enemies are acids and abrasives. The daily routine is boring on purpose:

• Use a pH-neutral stone cleaner or plain warm water with a drop of mild dish soap.

• Wipe spills immediately, especially coffee, wine, juice, and cooking oil. On sealed stone you have time — but not forever.

• Never use vinegar, lemon, bleach, or bathroom cleaners on marble, limestone, or travertine. Acids etch these stones on contact, leaving dull spots that no amount of cleaning removes.

• Skip abrasive pads and scouring powders. They scratch the finish, and scratches collect dirt.

For floors, a soft mop or vacuum with a brush head is enough. For counters, a soft cloth is enough. Stone care is mostly about what you don't do.

3. Stains: blot, don't rub — and know when to poultice

When a stain happens:

• Blot it up first. Rubbing pushes the stain deeper and spreads it.

• Clean with a pH-neutral cleaner and see what remains.

• For deep stains (oil, wine, rust), a poultice — a paste that draws the stain out of the stone as it dries — is the standard method. Poultice powders are sold for this purpose, and the process takes a day or two, not minutes.

• For etch marks (dull spots from acids), cleaning won't help — the surface itself is damaged. Light etching can sometimes be polished out; deep etching needs a professional hone.

If a stain doesn't lift after a poultice, call a stone restoration professional before trying stronger chemicals. The wrong chemical on the wrong stone makes things worse.

4. Outdoor stone: weather is the maintenance schedule

Outdoor stone lives a harder life than indoor stone:

• Reseal more often — rain, sun, and temperature swings wear sealer down faster.

• Watch for moss and algae in shaded, damp areas. Clean with a stone-safe outdoor cleaner, not a pressure washer on full power — high pressure can erode softer stone and force water into joints.

• In freeze-thaw climates, keep water from pooling on the surface and make sure joints and drainage work. Standing water that freezes is what cracks stone, not cold alone.

• Sweep grit off regularly. Sand and gravel underfoot act like sandpaper on any finish.

5. Care by stone type: softer stone needs more attention

• Marble and other softer stones: etch easily, stain more readily, need the most careful sealing and the strictest no-acid rule. Beautiful — and the most demanding.

• Granite and quartzite: harder and less porous, more forgiving of daily use, but still benefit from sealing.

• Limestone, travertine, and sandstone: porous and soft. Seal diligently, clean gently, and expect a patina over time — many owners consider that part of the charm.

Match your care routine to your stone, not to a generic "stone cleaner" label.

6. When to call a professional

Some jobs are DIY; some aren't. Call a stone restoration professional for:

• Deep etch marks or widespread dullness

• Stains that survive a poultice

• Cracked or loose pieces

• Full re-honing or re-polishing of a floor

A professional hone and reseal every few years costs far less than replacing stone that was neglected for a decade.

That's the short version. Seal it, clean it gently, wipe spills fast, and respect what acids do to softer stone. Do those four things and natural stone will outlast nearly everything else in the house.

If you're choosing stone for a project and want to know how much care a particular stone needs before you commit, send it over. We look at this stone every day.

— The Sino-Marble Team