Protect Your Investment
Granite & Natural Stone Countertop Resealing
Check Whether Your Stone Needs Sealing
Granite, marble, and quartzite can absorb liquids, but their need for sealer varies by stone and slab. We help homeowners understand when resealing may be appropriate—and when sealing is not the answer to a stain, etch, chip, or worn finish.
Why Sealing Matters
What Is Stone Sealing — and Why Do You Need It?
Natural stones such as granite, marble, and quartzite can be porous, though absorbency differs from one stone and slab to another. Oils, wine, coffee, and other liquids may penetrate a surface that readily absorbs them and leave a stain.
A penetrating stone sealer can reduce how readily liquids are absorbed by suitable natural stone. It does not make a countertop stain-proof or waterproof, and it is not a polish or a repair for existing damage.
Sealer performance varies with the product, stone, cleaning, and use, so a fixed schedule is not right for every countertop. A simple water test on a clean, inconspicuous area can help indicate whether the stone is absorbing moisture.
Schedule Your Resealing
Tell us about your stone and its condition so we can discuss whether resealing may be appropriate.
Know Your Material
Which Countertops Need Sealing?
Not all countertop materials need sealer, and a fixed interval does not fit every natural-stone slab. Use this guide to understand the differences.
Granite porosity varies by slab, so there is no single schedule for every countertop. Use a water test and the stone's condition to guide whether sealing is needed.
Marble's porosity and use vary. Check the surface periodically and follow guidance for your particular stone and sealer.
Quartzite density varies by slab. Check the surface periodically and base resealing on the specific stone's absorbency and condition.
Engineered quartz is non-porous by design. Sealing quartz does nothing — the product has no pores for the sealer to penetrate. Save your money.
Soapstone is naturally non-porous and does not require sealing. Mineral oil and beeswax are used to enhance and even out its natural patina, but neither is a sealant.
Know the Warning Signs
4 Signs Your Countertops Need Resealing
Your stone will tell you when it's time. Here's what to look and test for.
The Stone Absorbs Water
On a clean, dry natural-stone surface, place a few drops of water in an inconspicuous area. If the stone darkens as water absorbs, it may need resealing. A bead test is a practical indicator, not a guarantee of stain protection.
Stains Are Appearing
New marks from oils, wine, coffee, or other liquids may mean the surface needs attention, but stains can have different causes. Resealing does not remove stains; some may need separate treatment.
The Surface Looks Dull or Flat
Dullness can have several causes, including residue, etching, or surface wear. Resealing is not polishing and will not correct a damaged finish.
The Stone's Sealing Needs Are Unclear
Age alone does not determine whether a countertop needs sealer. Test the stone and consider its porosity, cleaning, and use rather than relying on a fixed calendar interval.
Try the Water Bead Test Right Now
On clean, dry granite or marble, place a few drops of water in an inconspicuous spot and observe whether the stone darkens as it absorbs moisture.
The test area may not be readily absorbing water. This is only a practical check, not proof that the surface is stain-proof.
The stone is absorbing moisture in that spot. Consider asking whether an appropriate sealer is recommended for your particular slab.
Professional vs. DIY
Choosing Between Professional and DIY Resealing
Homeowner-applied stone sealer may be an option when the product is appropriate for the stone and the label directions are followed. The surface should be clean and prepared as directed; residue can affect application.
A resealing assessment starts by checking whether the countertop is a suitable material and whether it needs sealer. If resealing is appropriate, surface preparation and product choice should follow the stone and sealer requirements.
- Full surface cleaning & degreasing
- Sealer selected for the stone
- Application according to product directions
- Consideration of surface condition
- Discussion of stain or damage concerns
- Often skips proper surface prep
- Consumer-grade sealer, shorter life
- Uneven application common
- May seal in residue or stains
- Time-consuming to do correctly
- Results depend on skill level
What to Expect
Our Resealing Process
We assess the entire countertop — checking for staining, etching, chips, or buildup that should be addressed before sealing. We'll tell you exactly what we find.
The surface is prepared according to the stone and chosen sealer's requirements. Existing residue, stains, or damage may need separate attention.
When resealing is appropriate, the selected penetrating sealer is applied according to its product directions.
The product is allowed to penetrate for the time specified by its manufacturer; excess is removed as directed.
Follow the product's instructions for drying and return to use. Sealing can reduce absorption but cannot guarantee stain prevention.
Common Questions
Resealing FAQ
Can I reseal my countertops myself?
Many stone-care sealers are sold for homeowner use. Follow the product label, test in an inconspicuous area, and make sure the product is appropriate for your stone and finish. Surface preparation matters: residue or grease can interfere with application. If you're unsure whether the stone needs sealer or what product is appropriate, ask a stone-care professional.
How long does professional resealing take?
The time depends on the countertop size, condition, preparation needed, and sealer instructions. Ask about the expected process for your stone; drying and return-to-use guidance should follow the specific product directions.
Do I need to clear my countertops before you arrive?
Yes — please remove everything from your countertops (appliances, items, decorations) before your appointment so we have full access to the entire surface. The more completely we can clean and seal every square inch, the better and more even the protection.
Will resealing remove stains from my granite?
No. Resealing does not remove existing stains; it can help reduce absorption on suitable porous stone. Some stains may respond to separate treatment, but results depend on the stain and stone. Chips, cracks, etching, and existing stains require assessment and may need separate repair or treatment.
How often should I have my granite countertops professionally resealed?
There is no single interval for all granite. Porosity differs among slabs, and use, cleaning, and sealer type also matter. Periodically test a clean, inconspicuous area with water and follow the guidance for the sealer used.
Does resealing work on quartz countertops?
No. Engineered quartz is non-porous and does not need a penetrating stone sealer. A sealer is not a treatment for quartz chips, cracks, or surface marks. For quartz-specific damage, see the quartz countertop repair page.
Is sealing the right service for your countertop?
Sealing may help reduce absorption on suitable natural stone, but it does not fix chips, cracks, etching, or existing stains. Quartz is an engineered surface and does not need a penetrating sealer.
Explore More
Other Stone Options
Ready to Protect Your Countertops?
Whether your countertops are overdue for resealing or you just want to establish a regular maintenance schedule, we're here to help. Serving homeowners throughout New Hampshire from our showroom in Epsom, NH.
Book Your Resealing
Fill out the form to ask about resealing for your countertop material.