Can I Seal Quartz Countertop?

Quartz countertops are an increasingly popular choice for kitchen and bathroom renovations due to their durability, low maintenance, and stylish appearance. However, some homeowners wonder if they need to apply a sealant to quartz counters to protect them. Here is what you need to know about sealing quartz countertops.

What is Quartz?

Quartz countertops, sometimes called 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, making it an extremely hard and durable surface.

Unlike natural stone countertops such as granite or marble, quartz does not need to be sealed regularly since it is non-porous. The resin binders fill in the natural pores of the stone, so quartz does not absorb stains and spills easily.

Do You Need to Seal Quartz Countertops?

The short answer is no. Since quartz is non-porous, it does not require sealing like natural stone does. The resin makes an effective barrier against moisture and stains. Over time, the sealants used on natural stone wear away, allowing the stone to absorb liquids again. But with quartz, the resins are integrated throughout the material.

Most quartz manufacturers agree that sealing is unnecessary. Dupont, which makes the most popular quartz resin, says their product does not need sealing. Major quartz brands like Caesarstone, Cambria, and Silestone also state that sealing is not required.

Reasons to Seal Quartz

While sealing is not required, some homeowners choose to apply a sealant to quartz for extra protection:

Enhance Stain Resistance

Sealing quartz can provide an added layer of protection, especially for heavily used areas around the sink and stove. If you want to fortify the resistance to oils, juices, wine, and other stains, a sealant can help liquids bead up and wipe away more easily.

Lessen Impact Damage

A quartz sealant minimizes the appearance of scuffs, scratches, and chips. It helps fill in micro-abrasions to make them less noticeable. This is most useful around high-traffic zones like near seating.

Simplify Cleaning

Sealing quartz creates a smoother surface so grime and dirt do not cling as easily. Your countertops stay cleaner longer, requiring less frequent scrubbing.

Refresh Appearance

Over time, sealing can restore the glossy sheen if your counters start to appear dull. It refreshes the as-new look, especially for older quartz surfaces.

What Sealant to Use on Quartz

If you opt to seal your quartz countertops, it is important to choose the right product:

  • Use a sealant made specifically for quartz, not natural stone. Stone sealers can discolor engineered quartz.
  • Pick a water-based acrylic sealant, not a solvent-based one which can damage the resin binders.
  • Select a non-toxic formula safe for food contact surfaces. Stay away from flammable and hazardous solvents.
  • Apply a thin layer of sealant according to the product directions. Just one or two coats is sufficient.

Popular picks for sealing quartz counters include Giani Granite Sealer and Miracle Sealants 511 Impregnator. Always test the sealant on a small inconspicuous area first.

How Often to Reapply Sealant

If you do seal your quartz countertops, reapplication is only needed every 1-2 years. Quartz does not require frequent sealing like porous natural stone. Simply apply a fresh coat when water and oils start to sit on the surface rather than bead up.

Can I Seal Quartz Myself?

Sealing quartz counters is a relatively easy DIY project. Make sure to clean the counters thoroughly before applying the sealant. Use a soft lint-free cloth to rub in the sealant in a thin even layer. Allow it to soak in for 15-20 minutes, then buff off any excess with a dry cloth. Avoid heavy usage for 24 hours.

Professional Sealing Services

You can also hire a professional countertop sealing company to seal your quartz surfaces. Pros have specialized tools, expertise, and access to commercial grade sealants. This is a good option if you want to restore the glossy finish on older quartz counters. Costs range $3-$7 per square foot depending on the location and provider.

Maintaining Quartz Countertops

To keep your quartz counters looking like new with or without sealant:

  • Wipe up spills immediately to prevent stains, especially oils and juices
  • Clean with a mild non-abrasive soap and water
  • Rinse thoroughly after cleaning
  • Avoid harsh chemicals and acidic cleaners
  • Use a trivet under hot pots and pans
  • Don’t cut directly on the counter surface
  • Protect quartz from prolonged sun exposure

Can I Seal Quartz Countertop Myself?

Yes, sealing quartz countertops is a DIY-friendly project. Here are some tips for properly sealing your quartz at home:

  • Clean counters thoroughly prior to sealing using just mild soap and water. Rinse well.
  • Tape off any areas you don’t want sealed like walls or backsplash.
  • Apply a thin layer of quartz-safe sealant with a soft cloth.
  • Allow sealer to penetrate for 15-20 minutes.
  • Buff off any excess sealant with a clean dry cloth.
  • Avoid heavy use of counters for 24 hours to allow sealant to fully cure.
  • Reapply sealant every 1-2 years or as needed.

Be sure to choose a sealant designed for non-porous quartz rather than natural stone sealers. Water-based acrylic formulas work best. Test in an inconspicuous spot first and make sure to apply an even thin layer of sealer. With proper quartz-specific sealant and application, DIY sealing can renew protection and luster.

Frequently Asked Questions About Sealing Quartz Countertops

Should I seal my quartz countertops?

Sealing is not necessary but can provide extra stain protection, easier cleaning, and a refreshed appearance. Most manufacturers do not recommend sealing quartz since it is non-porous.

What is the best sealer for quartz countertops?

Look for a water-based acrylic formula designed for non-porous engineered stone rather than natural stone sealers. Avoid solvent-based sealants. Popular options include Giani Granite Sealer and Miracle Sealants 511 Impregnator.

How long does a quartz countertop sealer last?

Reapplication is only needed every 1-2 years for quartz since it does not absorb sealant like porous stones.

Can I apply a quartz countertop sealer myself?

Yes, sealing quartz counters is a doable DIY project. Be sure to thoroughly clean, apply a thin even layer of quartz-safe sealer, and buff off excess.

Should I hire a pro to seal my quartz counters?

A professional can restore gloss and smoothness on older quartz. However, DIY sealing is simple for new installs. Consider your DIY skills vs. cost when deciding.


While sealing is not required, applying a quartz-specific sealer can be beneficial for extra protection and easier cleaning. For most homeowners, sealing quartz counters every couple of years helps maintain their durability, beauty, and function. Be sure to use a water-based acrylic formula made for non-porous engineered stone. Sealing quartz countertops can be a relatively easy DIY project with the right products and techniques.