What Is Stone Sealing and Who Needs It?

Stone sealing is the process of applying a liquid impregnating sealant to the surface of natural stone. The sealant soaks into the microscopic pores and fissures within the stone and forms a barrier that prevents water, oil and other liquids from being absorbed. This protects the stone from staining and reduces the risk of bacteria growing within the porous structure.

Sealing is essential for natural stone worktops. Granite needs resealing every 1–2 years. Marble needs even more frequent attention because it is softer and more porous. Limestone and slate also require regular sealing. Without it these materials can absorb coloured liquids (red wine, coffee, beetroot juice) and develop permanent stains within minutes.

Many homeowners upgrading from granite to quartz assume that sealing is just a standard part of stone worktop ownership. This is one of the most common misconceptions we encounter at Precious Marble. If you have been told your quartz needs sealing that advice is incorrect.

Why Quartz Is Different from Natural Stone

The critical difference is how quartz worktops are made. Natural stone (granite, marble, limestone) is quarried directly from the earth. It is cut into slabs and polished but its internal structure remains unchanged. All natural stone contains pores, veins and fissures that make it vulnerable to liquid absorption.

Engineered quartz is manufactured in a factory using the Breton process. Approximately 90–94% ground natural quartz crystals are mixed with 6–10% polymer resins and pigments. This mixture is compacted under vacuum pressure with intense vibration and then cured at around 90°C. The vacuum removes trapped air. The vibration ensures the resin fills every microscopic gap between the quartz particles. The curing locks the structure permanently.

The result is a surface with a water absorption rate below 0.05%. By comparison granite typically absorbs 0.2–0.5% and marble can absorb 0.2–1.0%. With effectively zero porosity there is nothing for a sealant to penetrate. The surface is already sealed by the resin that is built into the material itself.

Sealing Requirements by Material

What Sealant Actually Does to Quartz

If you accidentally apply stone sealant to quartz the result is not catastrophic but it is not helpful either. Because the surface has no pores the sealant cannot soak in. Instead it remains on the surface as a thin film. Over time this film creates several problems.

Yellowing. Most impregnating sealants are designed to be below the surface of porous stone where they are not exposed to UV light. When sitting on top of quartz they can yellow with sun exposure creating an uneven amber tint especially on lighter surfaces.

Hazing. The sealant film can create a hazy or cloudy appearance as it partially wears away. This is particularly noticeable on polished quartz finishes where the factory shine becomes dull and uneven.

Uneven wear. The film wears faster in high-traffic areas (around the sink, near the kettle, where you chop vegetables) creating a patchy appearance with some areas shiny and others dull.

Sticky residue. Some sealants leave a slightly tacky surface feel that collects dust and fingerprints more readily than the smooth factory finish.

Lifetime Maintenance Savings

The no-sealing advantage of quartz translates into real savings over the life of your kitchen. Consider the lifetime maintenance costs for a typical Bedford kitchen with approximately 3.5 square metres of worktop space.

Over a 20-year period a granite worktop requires approximately 10–20 sealing applications. If you hire a professional stone care company that is £80–£150 per visit totalling £800–£3,000 in sealing costs alone. Even doing it yourself with a quality impregnating sealant you are looking at £150–£400 in product costs plus your time. With quartz the answer is simple: £0 for sealing across the entire lifetime of the worktop.

Beyond the financial saving there is the convenience factor. With quartz you never need to remember when the worktop was last sealed. You never need to clear the kitchen for a sealing appointment. You never need to avoid using the worktop for 24 hours while sealant cures. It is genuinely maintenance-free in this regard.

The Simple Quartz Care Routine

Instead of sealing all your quartz worktop needs is basic daily cleaning. Here is the complete care routine recommended by our team at Precious Marble.

Daily: Wipe down with warm water and a small amount of washing-up liquid on a soft cloth. Dry with a clean cloth to prevent water spots.

As needed: For stubborn marks use a non-abrasive cream cleaner (such as Cif Original) on a soft damp cloth with gentle circular motions.

Always: Use trivets under hot pans. Use chopping boards for cutting. Wipe up strongly pigmented spills (turmeric, beetroot) promptly.

Never: Use bleach, oven cleaner or any product with a pH above 10 or below 3. These can degrade the resin binders over time.

That is the entirety of quartz worktop maintenance. No sealing. No special products. No professional maintenance visits. For Bedford homeowners who want a beautiful kitchen without the upkeep it does not get simpler than quartz. Browse the full range on our quartz worktops Bedford page.

No sealing. No fuss. Just a beautiful worktop that looks after itself. Visit our quartz worktops Bedford page to see colours and request a free no-obligation quote from our team.

Frequently Asked Questions

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This article is part of our growing Quartz FAQs hub where we answer the most common questions Bedford homeowners ask about quartz worktops. If you cannot find the answer you need feel free to call us on 01234 348590 or email info@preciousmarble.co.uk.