How to Seal White Quartz Countertops

Why Seal White Quartz Countertops?

Sealing is crucial for white quartz countertops for the following reasons:

  • Prevents stains – Quartz is non-porous, but sealing provides an extra layer of protection from wine, coffee, juice and other stubborn stains. This helps maintain the pristine white look.
  • Reduces etching – Acidic substances like lemon juice and vinegar can etch and dull quartz. Sealing minimizes this etching damage.
  • Easier cleaning – Sealed countertops repel dirt, grime and liquids. This makes routine cleaning much simpler.
  • Retains polish – Sealing fills in micro-scratches and keeps the glossy polished finish looking new for longer.
  • Adds shine – Sealing enhances the reflective properties to give white quartz countertops an eye-catching gleam.

When to Seal White Quartz Countertops

Sealing should be done:

  • After installation – New quartz countertops must be sealed immediately after installation to protect them.
  • Every 1-2 years – Reapply sealer regularly to refresh protection as it naturally wears off over time.
  • After heavy cleaning – Harsh cleaners can strip away sealer, so resealing is needed after deep cleaning.
  • When water stops beading – Test by sprinkling water on the surface. Reseal when water no longer beads and spreads out instead.

How to Seal White Quartz Countertops

Follow these step-by-step instructions for foolproof quartz countertop sealing:

1. Clean the Surface

Use a pH-neutral cleaner and microfiber cloths to clean countertops. This removes dirt, dust, oils and residue that can interfere with sealer penetration and bonding.

2. Dry Completely

Wipe away all moisture with a clean, soft cloth. Make sure quartz is completely dry before applying sealer, or it will turn white and cloudy.

3. Apply Sealer

Use a spray-on penetrating sealer made specifically for natural stone. Liberally apply an even coat across the entire surface using overlapping strokes. Don’t forget sink and cooktop cutouts.

4. Allow Sealer to Penetrate

Let sealer soak in for 5-10 minutes. This gives time for the sealer to properly bond and cure within the pores of the quartz.

5. Wipe Away Excess

Thoroughly wipe off all excess sealer with clean, dry microfiber cloths. Make sure to remove any pooled or puddled sealer.

6. Allow to Cure

Leave quartz untouched for a full 24 hours to allow sealer to fully cure. Avoid water or other liquids during this time.

7. Test Sealer

Once cured, test sealer by pouring a few drops of water on the countertop. It should bead up if sealed properly.

8. Reapply if Needed

If water is still being absorbed after 24 hours, do a second application following the same steps to build added protection.

Tips for Sealing White Quartz Countertops

Follow these pro tips when sealing:

  • Use a high-quality sealer made specifically for quartz like Dry-Treat 40SK. Cheap, hardware store sealers may not adequately bond and protect.
  • Do thin, multiple coats instead of one thick application for best results.
  • Seal when humidity is low to prevent cloudiness as sealer dries.
  • Limit cleaning with harsh chemicals and citrus juices which can break down sealer over time.
  • Avoid wax-based sealers which cause buildup and a greasy look on white quartz.
  • Reseal as needed based on usage, but at least every 1-2 years for maintained protection.

Maintenance After Sealing

Once properly sealed, follow these care tips:

  • For routine cleaning, use a mild pH-neutral cleaner and soft cloth or sponge. Avoid abrasive pads.
  • Rinse with clean water and dry after cleaning to prevent water marks and mineral deposits.
  • Immediately wipe up spills, especially juices and wine which can still stain over time.
  • Use cutting boards and trivets to protect from scratches and hot pans which can damage sealer.
  • Reseal periodically when water stops beading on the surface.

Frequently Asked Questions

Does new quartz need sealing?

Yes, it is highly recommended to seal new quartz countertops right after installation to protect them. Factory sealers wear off over time.

Is sealing quartz countertops necessary?

Sealing is strongly advised to prevent stains, etching and loss of shine on quartz surfaces. Unsealed quartz requires more frequent heavy-duty cleaning.

How long does quartz sealer last?

On average, a quartz sealer lasts 1-2 years with proper care before reapplication is needed. High-traffic areas may need more frequent resealing.

Can I use granite sealer on quartz?

Yes, penetrating stone sealers made for granite, marble and other natural stone also work well on quartz. Avoid flimsy hardware store brands.

What happens if you don’t seal quartz?

Unsealed quartz is prone to staining, etching and wearing of the finish. It will also require more intensive cleaning and maintenance over time.


Sealing white quartz countertops is vital for preventing stains and damage while simplifying cleaning. Follow the proper application steps using a quality penetrating sealer. Remember to reseal every 1-2 years based on usage and when water no longer beads. Proper sealing allows you to easily keep white quartz surfaces looking like new for years to come.