How Often Do You Have to Seal Quartz Countertops?

Quartz countertops are a popular choice for many homeowners due to their durability, aesthetics, and low maintenance. However, some routine care and sealing is required to keep them looking their best. Here is a detailed look at how often quartz countertops need to be sealed.

What is Quartz?

Quartz countertops, sometimes called engineered stone, are made from ground natural quartz crystals combined with resins and pigments. This creates an incredibly hard, non-porous surface that resists scratches, stains, heat, and water.

Unlike natural stone, quartz does not need to be sealed regularly since it is non-porous. However, periodic sealing is still recommended to enhance and maintain its protective qualities.

Do Quartz Countertops Need to Be Sealed?

While quartz itself does not require sealing, the seams between slabs are vulnerable to moisture and bacteria. Sealing creates a barrier that prevents liquids and germs from seeping into crevices along seams. It also prevents stains from absorbing into the adhesive used to bond slabs together.

So yes, sealing those seams is highly recommended for sanitary and aesthetic reasons, even though the quartz material itself is impervious.

How Often Should You Seal Quartz Countertops?

Experts generally recommend sealing quartz countertops every 1 to 2 years. While quartz won’t absorb stains like porous natural stone, sealing will refresh and maximize the durability of the seams. Here are some other factors to consider regarding frequency:

  • High Use Kitchens – If your kitchen sees heavy daily use, seal yearly. More cooking and cleaning means more exposure along seams.
  • Bathrooms – Seal bathroom countertops yearly since they are regularly exposed to moisture. Preventing water penetration is key.
  • New Installations – Seal new quartz counters twice in the first year – once immediately after install and again 6 months later. Get maximum protection on new seams.
  • Resealing after Deep Cleaning – Countertops may need resealing after deep cleaning or stripping to remove built-up grime. This ensures full protection is renewed.

How to Seal Quartz Countertops

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

  1. Clean counters thoroughly and let dry completely. Remove any residue, dirt, or grime.
  2. Apply denatured alcohol to a microfiber cloth and wipe all seams to remove oils or wax buildup.
  3. Read product instructions and prepare the quartz sealant as directed. Select a high-quality sealant made for stone and quartz.
  4. Dip a small lint-free cloth into the sealant and wipe along the length of all seams. Apply thin, even coats and avoid excess dripping.
  5. Allow the sealant to penetrate for 10-15 minutes. Then buff off any residue with a clean, dry cloth.
  6. Avoid surface contact with liquids for 24 hours as it fully cures. Sealant is immediately water-resistant but needs time to reach full effectiveness.
  7. Check that all seams appear shiny and revived. Reapply sparingly to any areas that still look dull or porous after drying.

Follow manufacturer’s cure times and safety guidelines when using any sealant products. With proper sealing, your beautiful quartz counters will maintain their impeccable appearance for many years. Consult a countertop pro if you have any concerns about the process.

FAQs about Sealing Quartz Countertops

How often do you have to seal quartz countertops?

Quartz countertops should be sealed every 1-2 years, more frequently with heavy use or in bathrooms. New installations benefit from sealing twice in the first year.

What is the best sealer for quartz countertops?

Look for sealers specifically designed for natural stone and engineered quartz. Penetrating silicone or impregnator sealers work best to protect seams.

Can you use a granite sealer on quartz?

Yes, granite and quartz sealers have similar penetrating formulas ideal for hard stone surfaces. Always check the label to verify quartz compatibility.

Is it absolutely necessary to seal quartz counters?

While not entirely necessary, sealing is highly recommended to prevent moisture penetration, staining, and bacteria buildup along seams over time.

What happens if you don’t seal quartz countertops?

Unsealed countertops may gradually collect stains and germs in seams that become harder to remove over time. Lack of sealing also makes deep cleaning more difficult.

Can you use wax on quartz instead of sealer?

No, waxes merely coat the surface and will not penetrate and protect vulnerable seams. Specialized sealers are required for moisture prevention and longevity.

How long does a quartz sealer last?

A quality quartz sealer will typically last 1-2 years with proper application. High-use areas may need yearly sealing for maximum protection.


While sealing is not strictly required for durable quartz counters, applying a quality sealant every 1-2 years is advisable to maintain the integrity of seams. Sealants prevent moisture penetration, stains, and bacteria growth in vulnerable crevices between slabs. With proper care, quartz countertops will stay looking pristine and avoid deterioration or damage over time. Be sure to reseal after deep cleanings and watch for signs of wear around high-use areas. With just occasional sealing, quartz can deliver lasting beauty while retaining its reputation as a low maintenance surface.