NYC Marble Care Inc. | 212-235-7330
Restoration gets the attention. Sealing does the work.
After more than a decade working on natural stone in some of New York’s most demanding residential and commercial spaces, the most common thing we hear from new clients is some version of the same story — a beautiful marble kitchen, a limestone bathroom floor, a travertine lobby — and somewhere along the way, nobody sealed it properly, or nobody sealed it at all. The etching, the staining, the dullness that sets in over time — most of it was preventable.
Stone protection is not a luxury add-on. It is the baseline maintenance that every natural stone surface needs, and it is the single most effective thing you can do to extend the life and appearance of what you already have.
Natural stone is porous. Marble, limestone, travertine, slate, sandstone — every one of them has microscopic channels running through the surface that absorb liquids on contact. Without proper sealing, a glass of red wine, a splash of cooking oil, or even plain water left sitting too long can work its way into the stone and cause staining that no amount of surface cleaning will fix.
A penetrating sealer fills those channels from within. It does not sit on top of the stone or change its appearance — a quality sealer is essentially invisible. What it does is create a barrier that gives you time. Time to wipe up a spill before it becomes a stain. Time between deep cleanings. Time before your stone needs professional restoration again.
Think of it as insurance that also happens to be invisible.
That depends on the stone, the finish, the location, and how much use the surface sees — but here are honest general guidelines:
The honest answer is that most surfaces in New York homes and buildings are either overdue or were never properly sealed to begin with. If you are not certain when your stone was last treated, that is usually reason enough to schedule an assessment.
The sealing market is full of off-the-shelf products that offer surface-level protection at best and can actually damage certain stone types at worst. We have tested and worked with a wide range of professional-grade products over the years, and the difference between a quality penetrating sealer applied correctly and a hardware store spray-on product is significant — both in terms of longevity and the way the stone looks and feels afterward.
One thing that often surprises homeowners: the cleaner you use day-to-day matters just as much as the sealer itself. When Architectural Digest covered marble care, our founder Welberson DosSantos put it plainly — “Acids are the enemy of any stone but especially marble.” That includes common household cleaners like vinegar, citrus-based sprays, and anything marketed as multi-surface. These do not just risk etching the stone — they actively degrade the sealant protecting it. Once that barrier is gone, the stone is open to staining until it is properly resealed.
That is why product selection and professional application both matter. A quality sealer applied over a surface that has been cleaned with the wrong products will not perform the way it should.
[Read the Full Architectural Digest Article →] https://www.architecturaldigest.com/story/how-to-clean-marble
For clients who want the highest level of protection available — particularly for kitchen counters, bathroom floors, and any stone surface that sees regular moisture or food contact — we work with Raku, a premium stone care system developed specifically for demanding natural stone applications.
Raku is food-safe, PFAS-free, and formulated to work with the stone rather than over it. We use it on projects where long-lasting protection and minimal maintenance are the priority — and where the stone is worth protecting properly. The system includes options for different stone types, finishes, and use conditions, and it comes backed by a manufacturer warranty when applied by a certified professional.
Learn More About Raku Stone Protection
Before any sealer goes down, the surface needs to be clean, dry, and free of any residue, wax, or previous coating that might interfere with penetration. In many cases we recommend a professional cleaning or light restoration before sealing — not to upsell the job, but because a sealer applied over contaminated stone will not perform the way it should.
The application itself is straightforward in skilled hands. The more important variables are product selection, surface preparation, dwell time, and buffing — the details that determine whether the sealer actually bonds and performs, or just sits on the surface until it wears off.
We work throughout Manhattan, Brooklyn, Queens, and Long Island — residential kitchens, bathrooms, lobbies, and commercial spaces. Every job starts with an honest assessment of what the stone needs, what products make sense for that application, and what kind of maintenance schedule will keep it looking right long-term.
If your stone has not been sealed recently — or if you are not sure — call us.
NYC Marble Care Inc. — Natural Stone Cleaning, Restoration, and Protection Serving the New York metropolitan area
