Do I Need to Seal My New Quartz Countertop?

Sealing quartz countertops is a common question for new homeowners. Quartz is an engineered stone made from crushed quartz, resin, and pigments that is very durable and low maintenance. However, there are some benefits to sealing quartz that are worth considering.

What is Quartz?

Quartz countertops are made from crushed quartz crystals combined with polymer resins and pigments. The quartz provides strength and durability, while the resins bind the material together. Here are some key facts about quartz:

  • Extremely hard and scratch resistant surface
  • Non-porous so resists staining
  • Does not require regular sealing like natural stone
  • Available in wide range of colors and patterns
  • Resists heat, scratches, and cracks better than granite
  • Lower maintenance than granite or marble
  • Not 100% natural stone, but engineered composite

Should I Seal My New Quartz Countertop?

While quartz does not require sealing, applying a penetrating sealer can offer some advantages:

Enhance Stain Protection

Although quartz resists stains very well on its own, a sealer provides an extra layer of protection, especially for oil-based stains. It fills in any microscopic pores in the surface. This can help peace of mind for homeowners wanting maximum stain prevention.

Smoother Surface

Sealing quartz creates an ultra-smooth surface that further resists messes and spills from absorbing. Liquids will bead up and wipe away easier.

Easier Cleaning

A sealed quartz countertop will be easier to clean and keep free of grease buildup. Grime and residues have a harder time clinging to the slipperier sealed surface.

Prevent Etching

Sealing provides a barrier against acidic liquids, such as citrus and tomato juice, that could potentially etch into the quartz surface over time with repeated exposure.

Enhance Shine

Sealing brings out a glossy, wet-look shine from quartz countertops. It intensifies the color and makes the finish more light reflective.

What Type of Sealer is Best for Quartz?

Look for a specialty sealer made for quartz rather than a standard stone sealer:

  • Use a penetrating sealer not a topical coating that will peel.
  • Select a sealer made for engineered stone like quartz.
  • Look for a non-toxic food-safe formula free of VOCs.
  • Get a sealer that will preserve the natural look of the quartz.

Popular sealers for quartz include Miracle Sealants 511 Impregnator and Dry Treat Premium Impregnating Sealer. Always follow the product instructions closely.

How to Seal Quartz Countertops

Sealing quartz countertops is a relatively simple DIY project. Here is a step-by-step guide:

  1. Clean the quartz thoroughly with a non-abrasive cleaner and rinse well.
  2. Apply painter’s tape around the edges to protect adjacent surfaces.
  3. Apply the sealer evenly according to product directions. Avoid excess pooling.
  4. Allow sealer to penetrate for 5-10 minutes.
  5. Thoroughly wipe away all excess sealer with clean cloths.
  6. Apply a second coat following the same steps.
  7. Remove painter’s tape after an hour.
  8. Avoid water or cleaning for 24 hours while sealer cures.

Sealing generally needs to be reapplied once a year to maintain effectiveness. Be sure to use a high quality quartz-specific sealer and follow all manufacturer application instructions for best results.

FAQs about Sealing Quartz Countertops

Does sealing quartz change the appearance?

High quality quartz sealers are designed to retain the natural look of the stone. Sealing should not alter the color or make the surface look artificial. Test seal a small area first.

Can I seal just part of my countertop?

It’s best to seal the entire surface evenly. Partial sealing can create visible differences on the countertop.

How long does it take to seal a countertop?

The sealing process takes about an hour. But the sealer then needs 24 hours to fully cure before regular use of the countertop resumes.

How do I know if I need to reseal?

Reapply sealer about once a year for maximum protection. If liquids start to absorb rather than bead up, it’s time to reseal.

Is sealing quartz countertops necessary?

Sealing is optional since quartz is non-porous. But sealing offers extra protection for homeowners wanting to maintain a flawless countertop surface.


While quartz countertops do not require sealing, applying a penetrating sealer can enhance stain resistance, improve cleanability, and reduce etching from acidic liquids. Specialty quartz sealers help prevent absorption while retaining the natural look of the stone. With proper application, sealing quartz is a relatively easy DIY project that adds an extra layer of protection. Be sure to use a sealer made specifically for engineered stone and reapply annually for the best results.