Can Quartz Countertops Be Sealed?

Quartz countertops are a popular choice for many homeowners due to their durability, aesthetics, and low maintenance. However, some people wonder if quartz countertops can or should be sealed to provide extra protection and prevent stains. Here is a detailed look at whether quartz countertops can be sealed, the pros and cons, and how best to care for quartz surfaces.

What is Quartz?

Quartz countertops, sometimes referred to as engineered stone, are made from ground natural quartz crystals combined with resins and pigments. The quartz content typically makes up 90-94% of the material, while the rest is polymer resins that bind it together.

Compared to natural stone countertops like granite and marble, quartz is non-porous, meaning liquid and stains cannot penetrate the surface. The resins make quartz more flexible and resistant to cracks and chips. Quartz counters are available in a wide range of colors and patterns to suit any style.

The Benefits of Sealing Quartz

Sealing is the process of applying a protective liquid coating to the surface of the stone. Sealers work by getting absorbed into the microscopic pores and acting as a repellent to moisture, oils, and stains.

Since quartz is non-porous, sealers don’t penetrate the material but rather create a layer on top. Potential benefits of sealing quartz include:

  • Enhanced stain resistance – Adds an extra barrier against staining from spills like wine, coffee, and juice. This can make cleanup easier.
  • Easier cleaning – Sealers enable liquids to bead up, so spills can be wiped away instead of setting into the surface. Can reduce appearance of grease and dirt buildup.
  • Preserve appearance – Provides protection from etching and dulling of the surface over time. Helps maintain the glossy, like-new look.
  • Prevent water marks – Sealers can reduce staining and spotting from water sitting on the quartz.

However, it’s important to note thatquartz already has excellent stain resistance and requires very little maintenance without sealers. The additional protection provided by sealing may be modest.

The Downsides of Sealing Quartz

While there are some potential advantages, there are also a few drawbacks associated with sealing quartz:

  • Temporary effect – Sealers do not last forever. Their protection wears off over time and needs to be reapplied, often every 1-2 years. This can be a hassle.
  • Can alter appearance – Some sealers slightly darken or add a glossy sheen to quartz. This alters the original factory finish.
  • Attracts dirt – The extra layer of sealer provides a surface for dirt and grime to cling to. May need to clean more often.
  • Difficult to remove – Taking off a sealer that has been applied can be very difficult. May require use of solvents.
  • Void warranty – Many quartz manufacturer warranties state that aftermarket sealers void the warranty. This is a big risk.
  • Not designed for quartz – Since quartz is non-porous, sealers don’t absorb well into the material. Using a sealer goes against the design and intent of quartz.

For these reasons, sealing doesn’t provide huge benefit to quartz countertops, and the drawbacks often outweigh any perks for most homeowners.

Do Quartz Manufacturers Recommend Sealing?

Nearly all major quartz brands including Caesarstone, Cambria, Silestone, and Viatera advise against sealing their products. The use of aftermarket sealers goes against their design and can void warranties.

As mentioned, quartz already has exceptional resistance to staining and etching without any added coating. The leading quartz manufacturers understand their products better than anyone, so their guidance should be followed.

Trying to “improve” quartz with a sealer against the advice of its maker is unnecessary and carries risk. Unless directed, assume sealing is not recommended for your particular quartz product.

Best Practices for Caring for Quartz

While sealing is generally not needed for quartz countertops, proper care is recommended to keep them looking like new. Here are some best practices for maintaining quartz:

  • For day-to-day cleaning, use a soft sponge or cloth with warm water and mild soap. Rinse thoroughly and dry with a towel.
  • For stuck-on dirt or stains, use a non-abrasive cleaner designed for stone surfaces. Avoid alkaline cleaners.
  • Blot spills quickly to prevent staining. For dried spills, use a plastic scraper to gently lift off.
  • Avoid placing hot pans directly on the surface. Use trivets and hot pads.
  • Reseal natural stone backsplashes and shower walls yearly, but not the quartz counters.
  • Avoid applying waxes, polishes, or cleaning products that can leave residue.
  • Use cutting boards instead of cutting directly on the quartz. Don’t let metal pots and pans scratch the surface.

Following the manufacturer’s care instructions is the best way to keep quartz counters in great shape for years. Sealing should not be required.

How To Seal Quartz (If You Choose To)

If you decide to seal quartz despite the drawbacks, here are some tips:

  • Test sealers first on a small inconspicuous area to ensure it provides the desired effect and appearance.
  • Opt for impregnating sealers that soak in rather than topical coatings that build up. Topical sealers are harder to maintain over time.
  • Apply the sealer evenly according to directions, likely using a cloth to rub it in. Remove any excess.
  • 2-3 thin coats are better than 1 thick coat for even coverage and optimal curing.
  • Allow the recommended drying time before using the surface. Ventilate the area well.
  • Be prepared to reapply a sealer every 1-2 years for maintained effectiveness.
  • Pick a reputable brand formulated for stone and quartz. Avoid cheap sealers.

Sealing quartz is ultimately a personal choice that may provide marginal benefit. However, proper maintenance without sealing is all that is required to keep quartz countertops looking pristine.

FAQs About Sealing Quartz Countertops

Should I seal my quartz countertop after installing it?

No, you do not need to seal a brand new quartz countertop. Quartz manufacturers apply their own proprietary sealants during fabrication, so aftermarket sealing is not required or recommended. Proper cleaning is all that is needed.

How often should you seal a quartz countertop?

Quartz countertops should not be sealed, as they are non-porous. If you do elect to apply a sealer, it will need to be reapplied every 1-2 years for maintained effectiveness as the protective coating wears off over time.

What kind of sealer is best for quartz?

If sealing, an impregnating sealer specifically designed for quartz is best. Topical coating sealers are not absorbed by quartz well and need frequent reapplications. An impregnating sealer will provide a modest amount of protection within the surface layer.

Can you use Granite Gold sealer on quartz?

Granite Gold makes sealers designed for both granite and quartz surfaces. However, quartz manufacturers still advise against aftermarket sealing. Use their products at your own discretion, as sealing may impact the original finish and warranty.

What happens if you don’t seal quartz?

If you do not seal quartz counters, nothing adverse will happen. Quartz is non-porous and already highly stain resistant without any added sealing. Not sealing quartz counters will save you time and hassle, while carrying no negative effects.


While sealing quartz countertops is possible for additional protection, it is not recommended or required by manufacturers. The non-porous nature of quartz means that sealers do not absorb well, and maintenance is straightforward without them. Sealing quartz provides only modest benefits at best, while carrying potential drawbacks like altering the look and voiding warranties. Proper cleaning is all that is needed to keep quartz counters looking pristine. Avoid sealing quartz unless explicitly directed by the manufacturer.