If you’re considering granite for your kitchen or bathroom, you may have heard different opinions about sealing. Some people say granite always needs it, others say only certain types do. When you’re making an investment in your home, the last thing you want is uncertainty. At Innovative Stone, we’ve helped families across Auburn, Grass Valley, Truckee, and the Tahoe area choose and care for granite countertops, and here’s what you need to know: most granite countertops should be sealed to stay beautiful and protected.

What is a Granite Sealer?

A granite sealer is a liquid solution designed to protect the stone’s surface. Granite is naturally porous, which means it can absorb liquids if left untreated. Sealers work by filling or closing those tiny pores, creating a barrier that resists stains, moisture, and bacteria while preserving the natural beauty of the stone.

There are two main types of sealers:

Penetrating Sealers – absorbed into the stone, offering long-lasting protection without changing the appearance.
Topical Sealers – sit on the surface and add shine but tend to wear faster in busy kitchens.

Most homeowners prefer penetrating sealers because they are durable and keep granite looking natural.

Why Granite Needs Sealing

Granite is strong, but without sealing it can still absorb liquids. That leads to stains, etching, and even bacteria growth. Sealing helps with:

Stain Prevention – protects against spills like wine, oil, or juice.
Bacteria Resistance – keeps moisture from settling into the stone.
Longevity – extends the life of your countertops and keeps them looking new.

How Often Should Granite Be Sealed?

In most homes, granite should be sealed about once a year. Denser stones may only need sealing every 2–3 years. The best way to know is with a simple water test:

Pour a few drops of water on the countertop.
Wait 10–15 minutes.
If the water darkens the stone, it’s time to reseal.

Where to Buy Granite Sealer

Ask your stone fabricator for recommendations (many offer sealing services as well).
Contact a reputable stone warehouse in your area.
Avoid “clean and seal” combo products, since they often don’t do either well.
Remember, good sealers are not cheap, but a little goes a long way.

How to Apply Granite Sealer

Applying granite sealer is simple if you follow the steps:

Clean the surface thoroughly with a stone-safe cleaner and let it dry.
Apply the sealer evenly with a soft cloth or sponge.
Pro tip: use the smallest amount of cloth or sponge you can so the sealer goes into the stone, not just into the applicator.
Let the sealer absorb for the time listed on the product label.
Wipe off any excess and buff with a clean, dry cloth.

Is Sealing Always Necessary?

Some high-quality granite or resin-treated slabs may not need sealing as often. The porosity of granite varies, so it’s best to confirm with your fabricator. When in doubt, sealing is an inexpensive, proactive way to protect your investment and ensure your granite countertops stay beautiful and functional for years.

Conclusion

Granite countertops add timeless beauty and strength to your home, but sealing is the key to keeping them stain-free and easy to maintain. At Innovative Stone, we’ve been guiding homeowners across Auburn, Grass Valley, Roseville, Truckee, and the Tahoe region for three generations. We’ll help you choose the right granite and give you clear advice on sealing so you can enjoy your countertops without stress.

If you’re planning granite for your home, we’d love to help. Contact us or try our Instant Estimate Tool to get started today.