Quartz countertops are a popular choice for kitchen and bathroom remodeling projects due to their durability, aesthetics, and ease of maintenance. However, there is some debate around whether or not quartz countertops need to be sealed. Here is a detailed look at the pros and cons of sealing quartz countertops to help you decide if it is right for your home.
What are Quartz Countertops?
Quartz countertops, sometimes referred to as engineered stone countertops, are made from crushed quartz combined with polymer resins and other materials. The quartz provides strength and hardness, while the resins bind the material together into a durable, non-porous surface.
Some key benefits of quartz countertops include:
- Hardness and scratch resistance – Quartz scores a 7 out of 10 on the Mohs hardness scale, making it extremely durable and resistant to scratches from knives and other kitchen tools.
- Non-porous – Unlike natural stone, quartz does not need to be sealed as it is non-porous and does not absorb liquids.
- Low maintenance – Quartz resists stains, etching from acids, bacteria growth, and other damage with routine cleaning.
- Variety of colors and patterns – Quartz is available in a wide array of colors, styles, and patterns to suit any design aesthetic.
- Heat resistance – Quartz can withstand heat up to 212°F without damage. However, trivets should still be used for very hot pans.
Do Quartz Countertops Need To Be Sealed?
The quick answer is no. Quartz countertops do not require sealing due to their non-porous nature. Since quartz does not absorb moisture, sealing it provides no real benefit and is not recommended by manufacturers.
However, some quartz owners do choose to apply sealants to enhance stain protection and create an easier-to-clean surface. The effectiveness and necessity of sealing quartz remains a point of contention among industry experts.
Here are some key considerations around sealing quartz countertops:
Quartz Density
All quartz is not created equal. Higher quality quartz is made with more quartz content, making it denser and non-porous. Lower quality quartz contains more resins and polymers, increasing porosity. Higher density quartz is even less likely to absorb liquids or stain.
Manufacturer Recommendations
Major quartz manufacturers like Caesarstone, Cambria, and Silestone do not recommend sealing their products. They stand behind the durability and stain resistance of their quartz with proper care and maintenance. Applying sealants goes against their usage guidelines.
Temporary Surface Enhancement
Some homeowners do choose to apply sealants to quartz to provide an extra layer of protection, especially in the first few months after installation. Sealants form a protective barrier that can make spills and messes easier to wipe up during this break-in period. However, the effects diminish over time.
Ongoing Maintenance
Sealants must be reapplied periodically to maintain their protective benefits. This involves a labor-intensive process of thoroughly cleaning and drying the countertops prior to reapplication. For those wanting a low-maintenance surface, frequent resealing is counterproductive.
Potential Damage
In some cases, sealants can react with the chemicals used in quartz manufacturing and cause damage, such as discoloration or reduced stain resistance. Solvent-based sealants are especially likely to interact poorly with quartz. Always consult your countertop provider before applying any products.
How to Seal Quartz Countertops
If you do opt to seal your quartz countertops, here are some guidelines to do it safely and effectively:
Choose the Right Sealant
- Look for water-based acrylic sealants specifically designed for use on quartz and engineered stone. Avoid silicone or solvent-based products that may damage the material.
- Opt for a penetrating rather than topical sealant to provide the most durable protection that won’t wash away over time.
- Consult your quartz manufacturer or supplier for their recommended sealant products.
Thoroughly Clean Countertops
- Remove all debris, dirt, grease, and soap residue so the sealant bonds directly to the quartz surface.
- Use a non-abrasive quartz cleaner and avoid harsh chemicals.
- Rinse thoroughly and allow countertops to dry completely before applying sealant.
Apply Sealant Correctly
- Carefully follow the product instructions for application. Spread thin, even coats using a clean cloth or foam applicator.
- Allow the recommended drying time between coats. Most sealants require 2-3 coats.
- Avoid over-application that can create a tacky residue and lead to streaks. A little goes a long way.
- Keep children and pets away from the area until fully cured.
Maintain Protection
- Reapply the sealant periodically as directed, usually every 1-2 years. Consult the product guidelines.
- For ongoing cleaning, stick to mild soap and water or quartz-safe cleaners. Avoid abrasive pads or harsh chemicals.
FAQs About Sealing Quartz Countertops
Should I seal quartz countertops after installation?
It is not necessary, but some homeowners choose to apply a sealant immediately after installation to help prevent staining and create an easier-to-clean surface during the initial break-in period. Consult your installer or supplier.
What is the best quartz countertop sealer?
Look for water-based acrylic penetrating sealants designed for engineered stone. Avoid silicone or solvents. Popular options include Miracle Sealants 511 Impregnator and GranQuartz Surface Shield.
How long does a quartz countertop sealer last?
Sealants typically last 1-2 years with proper care before needing reapplication. Durability depends on the product quality and adherence to application instructions.
Can I use a granite sealer on quartz?
You can, but quartz-specific sealants are a better option. Make sure the product states it is safe for use on engineered stone. Some granite sealants contain chemicals that may interact poorly with quartz.
How often should I seal my quartz countertops?
Quartz does not require regular sealing. However, sealants need reapplying every 1-2 years to maintain their protective benefits according to manufacturer guidelines.
Do professional quartz installers recommend sealing?
Most manufacturers and fabricators do not recommend sealing quartz countertops. However, some installers will offer to apply a sealant immediately after installation upon request to enhance stain protection. Always get professional advice about your specific quartz product.
Can sealing quartz countertops void the warranty?
It is unlikely, but confirm with your quartz supplier. Most warranties cover manufacturing defects, not damage caused by improper care or use of unapproved products. Sealing may be considered an unapproved modification by some manufacturers.
The Bottom Line – Should You Seal Your Quartz Countertops?
Quartz countertops do not require sealing thanks to their non-porousness. Leading quartz brands advise against the unnecessary use of aftermarket sealants on their products. However, sealants can provide an added layer of temporary stain protection during the first few months of use.
If you do opt to seal, use only quartz-safe water-based acrylic sealants according to manufacturer guidelines. Reapplication is needed every 1-2 years to maintain performance. Consult a quartz professional about your specific product before sealing to avoid potential damage.
With routine cleaning using mild soap and water, high quality quartz countertops will provide years of beauty and durability with or without sealants. Avoid abrasive cleaners or harsh chemicals that can dull the surface. Follow your manufacturer’s care and maintenance instructions to keep your quartz countertops looking like new.
Conclusion
Sealing quartz countertops is an optional extra step that may provide some temporary staining protection but is not required to maintain the durability of quartz. Consult your specific quartz manufacturer to see if they recommend application of sealants, and always use quartz-safe products properly applied. With routine cleaning, high quality quartz should maintain its resilience with or without extra sealing. Evaluate the pros and cons carefully before deciding if sealing is right for your quartz installation.