Are You Supposed to Seal Quartz Countertops?

Quartz countertops are a popular choice for kitchens and bathrooms due to their durability, low maintenance, and stylish appearance. Though quartz is remarkably stain, scratch and heat resistant, many homeowners wonder if they need to seal their quartz counters to protect them. Here is a detailed look at whether sealing is recommended for quartz countertops.

What is Quartz?

Quartz countertops, sometimes called engineered stone, are made from ground natural quartz crystals combined with resins and pigments. This mixture is molded into slabs and hardened to create a durable, non-porous surface.

The main benefits of quartz counters are:

  • Extremely durable – resistant to scratches, stains and heat
  • Low maintenance – doesn’t require regular sealing or polishing
  • Non-porous – does not harbor bacteria or mold growth
  • Stylish – available in a wide range of colors and patterns
  • Adds value – a quality investment that boosts home resale value

Do You Need to Seal Quartz Countertops?

The simple answer is no – quartz countertops do not require sealing. Since quartz is non-porous, sealants cannot penetrate the surface. Sealants are only effective on porous materials like natural stone, concrete, grout, and some wood.

Quartz manufacturers agree that sealing is unnecessary:

  • Caesarstone states that “due to its non-porous qualities, Caesarstone does not require sealing to repel liquids.”
  • Cambria explains that “Cambria quartz is nonporous so it never needs to be sealed.”
  • Silestone advises that “Sealing is not required for quartz surfaces.”

In fact, applying sealants to quartz can do more harm than good:

  • Sealants cannot bond properly and will eventually peel off.
  • Chemical sealants can dull the surface and require abrasive removal.
  • Sealing traps dirt and debris rather than allowing routine cleaning.

Since quartz repels liquids on its own, sealants provide no real benefits and could damage the surface.

Proper Care for Quartz Countertops

Though sealing is not needed, there are a few recommended care tips to keep quartz counters looking like new:

  • For routine cleaning, use a soft cloth or sponge with warm water and mild soap. Avoid abrasive cleaners or pads.
  • Disinfect surfaces occasionally with diluted white vinegar or rubbing alcohol.
  • Rinse thoroughly after cleaning to remove residue.
  • Blot spills quickly to prevent staining. For dried stains, use a non-abrasive cleaner.
  • Avoid exposing counters to strong chemicals like paint removers or oven cleaners.
  • Use trivets under hot pans to prevent burns. Quartz can withstand brief exposure to heat.
  • Re-apply caulk or grout as needed to seal the seams and prevent moisture damage.

With proper care, quartz countertops will remain in immaculate condition for many years without requiring any sealants. Their durable non-porous surface resists damage beautifully on its own.

Frequently Asked Questions

Why shouldn’t you seal quartz counters?

Since quartz is non-porous, sealants cannot soak in or bond effectively to the surface. Sealants end up sitting on top of the quartz, leaving an unnatural plastic-like film that requires removal. Quartz already repels liquids without any sealant.

What happens if you do seal quartz?

Sealants may initially make the quartz look darker and shiny. However, the plastic-like residue will eventually wear off unevenly, resulting in a blotchy appearance. The sealant could also trap moisture and dirt against the quartz. Abrasive stripping solutions would then be needed to remove the sealant coating.

How can you add shine to dull quartz?

If your quartz has lost its original shine, restore its luster by gently cleaning with a baking soda and water paste. For added shine, apply a thin layer of polishing wax formulated for engineered stone. Avoid wax buildup by buffing thoroughly. Regular polishing maintenance keeps quartz radiant.

Does the warranty cover sealing damage?

Sealing quartz against manufacturer advice could void any warranties. Homeowners should check their warranty terms before applying any sealants, cleaners or finishes not specifically recommended for quartz surfaces.

Should you seal around the edges of quartz?

Sealing the seams and edges around quartz counters is wise to prevent moisture damage, since joints between slabs are porous. Use a flexible silicone caulk to seal all joints near sinks or faucets. Re-apply caulk periodically as needed to maintain watertight seals.


Quartz manufacturers agree that quartz counters do not require sealing due to their non-porous qualities. Sealants cannot bond effectively to quartz and end up creating more problems than they solve. With simple care like prompt cleaning and trivet use, quartz maintains its durability and beauty without sealants. Focus instead on keeping quartz joints well-caulked to prevent water damage along countertop seams. With its resilient stain-proof surface, quartz offers lasting luxury without the need for sealing.