FAQ: Do I Really Need to Seal Natural Stone Countertops?

Do You Need to Seal Marble Countertops? | NY, NJ, CT

Short answer: sometimes.

It depends on the type of stone—and what kind of damage you’re trying to prevent.

Sealing helps protect against staining.
It does not prevent etching, dull spots, or surface damage.

What Sealing Actually Does

Sealers are designed to slow down how quickly liquids absorb into porous stone.

That means:

• Oils, wine, and water are less likely to soak in and stain
• You get more time to wipe up spills

Sealing is helpful—but it’s not a complete form of protection.

What Sealing Does NOT Do

Sealing will not:

• Stop etching from acids (lemon, vinegar, wine)
• Prevent dull spots or wear patterns
• Protect against surface damage

This is where most homeowners get misled.

Do You Need to Seal Each Type of Countertop?

Marble
Yes—but sealing only helps with staining. Marble is still vulnerable to etching.

Granite
Sometimes. Some granite is dense enough that it doesn’t need frequent sealing.

Quartzite
Usually yes. It’s often more porous than people expect.

Quartz (engineered stone)
No. It is non-porous and does not need sealing.

Limestone / Travertine
Yes. These are very porous and benefit from sealing—but are still sensitive to etching.

Soapstone
No. It is naturally dense and typically treated with mineral oil instead.

How to Tell If Your Countertops Need Sealing

A simple test:

• Put a few drops of water on the surface
• Wait 5–10 minutes

If the stone darkens, it’s absorbing moisture—and could benefit from sealing.

The Bottom Line

Sealing is useful—but limited.

It helps slow down staining.
It does not stop etching or restore damaged stone.

If your countertops are already showing dull spots, etching, or wear, sealing alone won’t solve the problem.

If you’re unsure what your stone needs, a professional evaluation can help you avoid unnecessary products and get the right solution the first time.

Serving homeowners across New York, New Jersey, and Connecticut.