Quartz countertops are an increasingly popular choice for kitchens and bathrooms due to their durability, low maintenance, and stylish appearance. Unlike natural stone countertops, quartz is engineered from raw quartz crystals combined with resins and pigments, making it non-porous and resistant to scratches, stains, and heat. However, some homeowners may still wish to seal their quartz countertops for added protection. Here is what you need to know about sealing quartz countertops.
What is a Quartz Countertop?
Quartz countertops, also known as engineered stone, are made from approximately 90% ground quartz crystals combined with polymer resins and pigments. The resins bind the quartz particles together to form a hard, non-porous surface. The pigments add color and pattern.
Benefits of quartz countertops:
- Extremely durable – resistant to scratches, stains, heat, and impact
- Requires very little maintenance
- Non-porous so does not need frequent sealing
- Available in a wide variety of colors and patterns
- Has a smooth, glossy finish
Brands like Caesarstone, Cambria, and Silestone manufacture high-quality quartz countertops.
Do You Need to Seal a Quartz Countertop?
The short answer is no – quartz countertops do not require sealing. Here’s why:
- Quartz is non-porous – Liquids cannot penetrate the surface, so sealing is not necessary. Natural stone countertops like granite and marble are porous and do need sealing.
- Most quartz has antimicrobial protection – Many quartz brands incorporate silver ions or other antimicrobial technology to inhibit bacteria growth and resist stains.
- Quartz is stain-resistant – The resin makes quartz highly resistant to stains from spills like wine, coffee, and vinegar that can stain other surfaces.
- Manufacturers don’t recommend sealing – Major quartz brands advise consumers not to seal their countertops. It will not improve stain resistance.
So in summary, sealing is typically not necessary for quartz since the material is non-porous and stain-resistant in its own right.
Are There Any Reasons to Seal a Quartz Countertop?
While sealing is not required, some homeowners may opt to apply a penetrating sealer to quartz for added protection:
- If the countertop will be used heavily for food prep and cutting. The sealer can provide a barrier against acids from citrus, tomatoes etc.
- In bathrooms, sealing may guard against moisture damage around sinks.
- For peace of mind, though it’s not essential. Some people just prefer the idea of adding a sealant layer.
Use only sealers made specifically for quartz. Look for water-based penetrating sealers that contain silicone, as sealers with solvents can damage quartz. Reapply only as directed, like once a year.
What’s the Process for Sealing a Quartz Countertop?
Sealing quartz isn’t difficult but follow product directions carefully:
- Clean the countertop thoroughly -Remove all debris, dirt, and residues. Rinse and let dry completely.
- Apply sealer evenly – Use a soft cloth or applicator pad. Allow proper drying time.
- Buff off excess sealer – Completely remove all excess product. Quartz can appear hazy if residue is left.
- Cure time – Avoid cleaning or placing anything on quartz for at least 24 hours after sealing.
- Reapply as directed – Typically no more than once per year. Over-sealing can create a plastic-like sheen.
Hiring a professional can ensure proper preparation, application, and removal. Improper sealing can damage the countertop appearance.
FAQs About Sealing Quartz Countertops
Should I seal quartz annually?
No, only seal quartz as often as the product instructions recommend. Most specify sealing just once per year is sufficient, while some indicate once every several years.
Does sealing quartz make it shinier?
Sealing will not significantly enhance the surface gloss. Quartz already has a polished, shiny finish. Over-sealing can leave a plastic-looking sheen.
Can I use granite sealer on quartz?
Not usually. Check that any sealer is specially formulated for quartz. Granite sealers can discolor or damage a quartz surface.
What happens if you don’t seal quartz?
With proper care, an unsealed quartz countertop will be totally fine. The material is non-porous and stain-resistant on its own. Sealing provides an added precaution but is not mandatory.
Does sealing prevent quartz from staining?
Sealing provides an added layer of protection against stains but isn’t completely failsafe. Spills should still be cleaned up promptly from a sealed or unsealed quartz countertop.
Conclusion
While sealing is not essential, some quartz owners choose to apply a penetrating sealer for extra peace of mind against stains and bacteria. Use only sealers made for quartz and follow directions carefully to avoid damage. With routine care, quartz countertops will maintain their good looks and perform well for years whether sealed or unsealed.