HOW TO PROTECT YOUR NATURAL STONE COUNTER TOPS

Natural stone looks great when it’s first installed, but without proper sealing, marble, granite, limestone, and travertine can absorb water, oil, soap, and everyday spills. Over time, that leads to staining, dark spots, and premature wear.

For contractors, sealing is one of the most important steps in protecting the installation and preventing callbacks. For homeowners, it’s the difference between stone that stays clean and stone that becomes difficult to maintain.

Why Natural Stone Needs Sealing

Most natural stone is porous. Even dense materials like granite can absorb moisture and contaminants over time.

Without proper protection, stone can develop:

  • Water spots and darkening
  • Oil and grease stains
  • Soap scum buildup
  • Mold or mildew in wet areas
  • Surface discoloration
  • Premature wear in high-traffic areas

Sealing helps reduce absorption, so the stone stays easier to clean and better protected.

What Not to Do

A lot of sealing problems come from poor prep or using the wrong product.

Avoid:

  • Sealing over dirty or damp stone
  • Using topical coatings that trap moisture
  • Applying too much sealer and leaving residue
  • Using the wrong sealer for polished vs. textured stone
  • Skipping cure time after installation

Sealing over residue or moisture can trap contaminants and cause haze or uneven appearance.

 

Step-by-Step: How to Seal Natural Stone Properly

Step 1 – Clean the Surface Thoroughly
Remove dust, residue, grout haze, grease, and any contaminants before sealing. The stone must be clean so the sealer can penetrate properly. Use FABER 30 to deep-clean the stone and remove any invisible residues that could block the sealer from penetrating properly.

Step 2 – Let the Stone Dry Completely
Stone should be fully dry before sealing. Moisture trapped below the surface can interfere with penetration.

Step 3 – Test a Small Area
Always test in an inconspicuous spot first to confirm appearance and absorption.

Step 4 – Apply the Sealer Evenly
Use a clean cloth, applicator pad, or lambswool applicator to apply an even coat.

Step 5 – Allow Proper Dwell Time
Let the sealer penetrate according to manufacturer instructions. This is what creates the protective barrier.

Step 6 – Remove Excess Product
Wipe off any excess before it dries on the surface. This helps prevent haze or streaking.

Step 7 – Allow Full Cure Time
Keep the area dry and free of traffic until the sealer has fully cured.

Where PROTW LUX Fits In

For marble, granite, and other natural stone surfaces, a penetrating sealer like PROTW LUX from Faber Chimica is designed to help protect against water, stains, and everyday contaminants without changing the look of the surface. Unlike cheaper products, it is superior in that it penetrates deeply even into the most dense, highly polished materials, where standard sealers might fail to provide enough protection. PROTW LUX remains 100% breathable and never leaves a plastic film or yellowing residue on the surface. Additionally, it is certified safe for food contact.

It is commonly used for:

  • Marble countertops
  • Granite countertops
  • Stone showers
  • Natural stone floors
  • Interior and exterior stone surfaces

For contractors, using the right penetrating sealer helps protect the installation and reduces long-term maintenance issues.

Simple Maintenance Routine

To keep sealed stone performing well:

Weekly

  • Clean with a pH-neutral stone cleaner like Faber ALGAFLOOR. Commercial soaps leave sticky films that attract dirt and grime, whereas a “zero-residue” cleaner preserves the stone’s beauty and makes the sealer last much longer.

Monthly

  • Check high-use areas for the appearance of water absorption into the stone

As Needed

  • Reapply PROTW LUX sealer based on frequency of use and stone type

ALWAYS: Avoid acidic cleaners, bleach, and harsh degreasers that can break down the sealer over time.

 

Find Professional Applicators Here

 

Quick Takeaway

Sealing natural stone correctly helps prevent staining, moisture issues, and long-term surface damage. The key is proper prep, full dry time, even application, and using a penetrating sealer designed for stone.

 

FAQ – Sealing Marble, Granite, and Natural Stone

Does marble need to be sealed?
Yes. Marble is porous and can stain or etch if left unprotected.

How often should natural stone be sealed?
It depends on the stone, traffic, and use, but most surfaces should be checked annually.

Can I seal stone right after installation?
Only after the stone and setting materials are fully cured and the surface is dry.

What happens if I leave too much sealer on the surface?
It can dry as residue or haze and affect appearance.

Does granite need sealer too?
Many granites benefit from sealing, especially in kitchens and wet areas.

How often should natural stone be sealed?
Using a professional combination (ALGAFLOOR cleaner + PROTW LUX sealer) as soon as it appears necessary extends the lifespan of the treatment.