Natural stone countertops look premium the day they’re installed.

But many failures start long before the homeowner notices a problem.

Contractors see the results later:

• Oil stains around sinks and cooktops
• Water darkening near seams
• Etching and discoloration
• Difficult cleanup during installation
• Callbacks caused by absorption issues

In many cases, the stone was never properly protected before installation. That’s the real problem.

 

Why Natural Stone Countertops Stain So Easily

Natural stone is porous to varying degrees.

Materials like:

• Marble
• Limestone
• Travertine
• Quartzite
• Some granites

can absorb:

• Water
• Oils
• Food residue
• Grout haze
• Installation contaminants

Once contaminants penetrate below the surface, removal becomes far more difficult.

And during installation, countertops are exposed to:

• Adhesives
• Grout
• Dust
• Moisture
• Metal tools and materials

Without protection, the stone starts absorbing contaminants immediately.

 

Why Pre-Installation Protection Matters

Many sealing problems happen because protection is applied too late.

Once the countertop is:

• Installed
• Exposed to moisture
• Used daily

the stone is already vulnerable.

Pre-installation treatment helps:

• Reduce absorption from the start
• Improve stain resistance
• Simplify installation cleanup
• Protect sensitive materials during handling and grouting

For contractors, this reduces risk before the countertop is ever put into service.

 

What Not to Do

Avoid these common mistakes:

1. Don’t wait until after installation to seal
   Contamination can occur during the install process itself.
2. Don’t use topical coatings on countertops
   They can peel, discolor, or create uneven finishes.
3. Don’t assume granite never needs protection
   Some granites are highly absorbent.
4. Don’t over-apply sealer
   Excess residue can create haze or inconsistent appearance.

 

The Right Approach: Penetrating
Pre-Installation Protection

A penetrating treatment designed for natural stone countertops helps protect the material from within.

The goal is to:

• Reduce absorption
• Maintain natural appearance
• Simplify maintenance
• Protect the surface during installation and daily use

This is especially important for light-colored and porous materials.

 

This is where you need Faber
HIDRO SST Penetrating Sealer!

Faber HIDRO SST is a high-performing treatment to protect natural stones against staining agents and rising humidity. The product is water-based, LEED-mapped, and its formula is VOC-FREE. Thanks to its ability to penetrate the thickness of the material it ensures strong and long-lasting protection. HIDRO SST doesn’t create a film on the surface and therefore preserves the material’s original breathability. HIDRO SST protects the stone against all humidity-related issues such as rust, yellowing, flaking, and salt efflorescence. The protection that the product provides reduces the ability of the surface to collect dirt. HIDRO SST is particularly recommended as a pre-installation treatment on natural surfaces like marble, granite, limestone, sandstone, slate, basaltina, quartzite, porphyry, travertine, marble-cement agglomerate, and marble-resin agglomerate.

BENEFITS

• 100% Water-based
• Highly effective against humidity, salts, and efflorescence
• VOC FREE
• LEED-Mapped
• Long-lasting protection

 

Step-by-Step: Pre-Treating Natural Stone Countertops

 Step 1: Ensure the surface is clean and dry

• Remove dust, dirt, and residues.
• Use a pH-neutral cleaner like Faber Algafloor.
• If deep cleaning is called for, use Faber 30 alkaline grease cutter.
• Double-strip thick wax deposits with Faber DEC 21 + Faber 30.
• Allow the surface to dry completely.

Moisture trapped in the stone can affect sealer penetration.

Step 2: Apply a penetrating pre-treatment sealer

Use a pre-installation treatment designed for natural stone countertops, such as Faber HIDRO SST.

• Before applying the product, it is necessary to take a preliminary test on an unexposed area or unused piece of material to check the product’s suitability.
• Apply evenly across the entire surface.
• Include edges, seams, and cutouts.
• Avoid over-saturating the material.
• After about 5-10 minutes, before the product dries, even out any superficial residues.
• Avoid allowing excess product to dry on the surface.

Step 3: Allow penetration time

• Let the treatment absorb into the stone evenly.
• Wait around 1-2 hours for the product to dry.
• This is where the protection develops within the material.

Step 4: Remove excess residue

• Wipe away any remaining dry surface residue using a damp cloth.
• Rinse away any leftover dry residue, if necessary.

Step 5: Allow proper curing

• Let the treatment cure fully for 24 hours before any exposure to moisture.
• Proper curing improves long-term performance.

 

 

Find Professional Applicators Here

 

 

Why This Method Works

Penetrating sealers work below the surface instead of creating a topical coating.

They:

• Reduce liquid absorption
• Help resist staining
• Preserve the natural appearance of the stone
• Improve cleanup during and after installation

For contractors, this means:

• Better installation protection
• Fewer stain-related callbacks
• Easier long-term maintenance for clients

 

 

Simple Maintenance Routine

Once protected, natural stone countertops still require proper care.

Daily Cleaning

• Use pH-neutral stone cleaners like Faber Algafloor.
• Avoid acidic or abrasive products.

Wipe Spills Quickly

• Especially oils, wine, coffee, and acidic foods.

Avoid Harsh Chemicals

• Bleach, vinegar, and strong degreasers can damage the stone or reduce sealer performance.

Periodic Resealing

• Depending on usage and stone type, reseal as needed.

FAQs

Q: Why seal natural stone before installation?
Pre-installation sealing helps protect the stone during handling, grouting, and daily use from the very beginning.

Q: Does granite need sealing?
Some granite is dense, but many varieties are still porous and benefit from protection.

Q: Will a penetrating sealer change the appearance of the stone?
A quality penetrating sealer is designed to preserve the natural finish without creating a surface coating.

Q: How long should the sealer cure?
Cure time varies depending on product and environmental conditions. Follow manufacturer recommendations.

Q: Can sealing prevent all stains?
No sealer makes stone 100% stain-proof, but proper protection significantly reduces absorption rates, allowing for more time to react to spills, and avoid staining risk.

Bottom Line

• Natural stone countertops are vulnerable long before the project is complete.
• If the material isn’t protected early, staining and absorption problems can begin during installation itself.
• Using a penetrating pre-installation treatment like Faber HIDRO SST helps contractors protect natural stone from the start, thus reducing risk, simplifying cleanup, and improving long-term performance without changing the natural look of the surface.