Quartz countertops are an increasingly popular choice for kitchen and bathroom remodeling projects. Made from ground quartz crystals combined with resins and pigments, quartz offers the look of natural stone with increased durability and lower maintenance. But one question that often comes up is whether quartz countertops need to be sealed. Here is a comprehensive look at the sealing requirements for quartz countertops.
What is a Sealer and Why is it Used?
A sealer is a liquid applied as a coating to the surface of natural stone countertops like granite, marble, and soapstone. Sealers work by getting absorbed into the microscopic pores of the stone, creating a barrier that prevents moisture and oils from penetrating deep into the stone. This protects the stone from stains that can be difficult or impossible to remove. It also reduces the need for frequent cleaning and polishing to keep natural stone countertops looking their best.
Sealers wear off over time and need to be reapplied periodically, usually once or twice a year. Resealing maintains the protective barrier and refresh the appearance of stone countertops.
Do Quartz Countertops Need to be Sealed?
Unlike natural stone, quartz countertops are engineered from over 90% ground quartz crystals combined with resins, polymers, and pigments. This manufacturing process makes quartz non-porous, so liquids and oils do not penetrate the surface. This means quartz does not require sealing in the same way natural stone does.
The resins make quartz resistant to stains and etching from acidic foods and liquids. Quartz manufacturers state their products do not need sealants. Applying a sealer to quartz is unnecessary and will not provide any added protection or benefits.
Reasons Some Still Seal Quartz
Though sealing is not required, some quartz owners choose to apply sealers for other reasons:
- Enhance shine – Sealers can accentuate the glossiness of quartz, giving it an extra shine after application. This effect is temporary though and wears away after several weeks.
- Ease cleaning – Sealers form a thin surface layer that repels water, grease, and dirt. This can make daily cleaning of quartz a little easier and prevent buildup.
- Personal preference – Some people just prefer the routine of sealing their countertops, whether quartz or natural stone, to maintain pristine condition. The act of sealing gives them peace of mind.
If you do opt to seal quartz, use a sealer made specifically for engineered stone and always follow label directions closely. Reapply only as needed, not on a fixed schedule as you would with natural stone.
Best Practices for Quartz Countertop Care
Since sealers are unnecessary for quartz, proper cleaning and care is important to keep your countertops looking like new:
- Blot spills quickly to prevent staining, especially oils, wine, and fruit juices
- Clean with mild soap and water – Avoid abrasive cleaners or pads
- Rinse thoroughly after cleaning to remove residue buildup
- Avoid exposing to strong chemicals like paint removers, oven cleaners, etc.
- Use trivets and hot pads under hot pans to prevent thermal shock.
- Don’t cut directly on the surface to prevent scratches and chips. Use a cutting board.
- Have countertops re-polished by a pro if dull spots develop from use over time.
Key Takeaways on Sealing Quartz
- Quartz countertops are non-porous and do not require sealing like natural stone does.
- Sealers cannot penetrate or bond with quartz so they offer no added protection.
- Some owners still seal quartz occasionally to help with shine, cleaning, and general maintenance.
- For best results, simply keep quartz clean with mild soap and water and follow manufacturer care guidelines.
- No sealing is needed to keep quartz countertops looking beautiful for years.
Frequently Asked Questions
Can sealing quartz change the color?
Sealers typically do not alter the color or appearance of quartz countertops. They are designed to soak into natural stone but cannot penetrate the solid surface of quartz. In some cases, a sealer may slightly darken or enhance the existing color and patterns, but this is temporary.
Does sealing help remove stains from quartz?
No, sealers cannot help remove existing stains from quartz countertops. Since sealers do not penetrate or bond with quartz, they do not interact with stains on the surface. Proper stain removal for quartz involves abrasive cleaning, sometimes with chemicals, based on the type of stain.
Should I seal around the sinks and joints?
Sealing around sink cutouts, seams, and joints is not necessary for quartz. These areas are solid quartz surface and non-porous like the rest of the countertop. Quartz sealers will not absorb into these areas or provide added protection. Proper installation with adhesives and sealants prevents moisture issues.
How often should I reseal quartz countertops?
Since quartz does not require sealing at all, there is no recommended resealing interval. Sealers will simply sit on the surface without bonding and eventually wear off. At most, sealing quartz a couple times a year for appearance may be reasonable, but frequent resealing provides no real benefits.
Does sealing quartz make it more heat resistant?
No, applying a sealer will not make quartz more resistant to heat damage. Resistance to heat comes from the properties of the solid quartz material itself. As long as you use trivets for hot pans, quartz can stand up to normal cooking temperatures. Avoid exposing quartz to extreme direct heat.
Conclusion
While sealing adds protection for natural stone countertops, it is unnecessary for engineered quartz surfaces. The non-porous composition of quartz prevents stain absorption and etching without a sealer. An occasional sealing for appearance only is fine, but in general, cleaning quartz with mild soap and water is all that is needed to keep it looking like new for years. With proper care, quartz countertops will provide long-lasting durability and beauty without the need for sealing.