Should White Quartz Countertops Be Sealed

Should White Quartz Countertops Be Sealed

Should White Quartz Countertops Be Sealed?

Many consumers choose variations of white quartz because of its predictable patterning, beautiful colors, durability, and because of a plethora of misinformation about quartz.

As the author of this blog, I've spent more than 30 years in the stone industry, and 25 of those years as the owner of a stone fabrication business. We had a full-time service department that maintained all types of natural and engineered stones.  I've since retired from the fabrication business, but I'm still heavily involved within the industry.

It is common for us to receive questions on our product pages through emails and comments on our blogs. I plan to answer some of the questions related to sealing quartz, stains, and related issues on this blog.

Today we received an email from a customer that recently had a white quartz countertop installed in her kitchen. Having questions about quartz care and maintenance, she reached out to us with an email. 

Does Quartz Need to be Sealed

    From The Customer: "Leigh P"

    "We just installed new white quartz countertops. The company we used said that it is man-made and therefore doesn't need to be sealed. I just read that I should never "seal" quartz countertops. I was told that sealants can dull the shine over time. Now I'm confused and have a couple of questions.

    • Should I seal my quartz countertops?
    • Can I use Supreme Surface Granite, Quartz & Marble Treatment to make them more protected, shiny and bright?" 

    From Our Stone Pro: 

    It is true that engineered stone countertops, or “quartz" countertops, are man-made. However, this has nothing to do with the rate of absorption or durability. Should engineered stones such as quartz countertops be sealed? In my opinion white quartz should be sealed with a sealer made for quartz surfaces. However, you can't use just any sealer because of the possibility of an adverse reaction.

    Do Not Use Common “Penetrating Sealers” on Quartz Countertops

    Quartz counters are made from a natural stone aggregate and unsaturated polyester resin. The resin can have an adverse reaction with a solvent based sealer. This is one reason why I wouldn't recommended sealing quartz countertops with common penetrating sealers, "NOT" because they "won't" or "can't" stain.  

    As you have discovered, quartz counters do not shine like a polished granite. It is not recommended to use a standard type of polish on quartz surfaces, because many standard types of polish contain wax that can build up, flake off and show wear over time.

    Chemicals That Cause Damage to Engineered Stones, AKA Quartz Countertops

    According to popular brands such as Silestone, Cambria, TechniStone, Zodiaq and more, consumers should avoid using products that contain:

    • Abrasive solutions
    • Strong alkaline 
    • Acid cleaners
    • Free radicals
    • Oxidizers

      Discover "The ioSeal™ Advantage on Quartz"

      • An additional level of protection against: stains, hard water spots, calcium and limescale buildup
      • Safe to use on unsaturated polyester resin, natural and engineered stones
      • Surfaces become smoother, more reflective
      • Colors become more vibrant
      • Helps protect against UV rays and fading
      • Supreme Surface® Granite, Quartz & Marble Treatment with ioSeal offers a safe and simple solution to clean, shine, protect, and preserve quartz countertops, all in one spray.

      Helpful Links:

        Editor’s Note: This post was originally published in September of 2017 and has been updated for accuracy and comprehensiveness.

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        • Tom Munro
        Comments 6
        • Joyce

          What if I applied some water base stone protector on the quartz countertop, I only applied it once on my new quartz countertop. Have I done any damage to my new quartz countertop? Please advice!

        • Susan Goto
          Susan Goto

          We have new quartz countertops- white with a bit of gray- 511 was recommended for us to seal the countertops- do you think the product is alright.? The counter is so beautiful I’m afraid to put anything on it, but I can see it needs to be sealed. Thank you

        • Aleksander Banchs
          Aleksander Banchs

          I bought several of your products. They work great. Does any of your products get rid of water stain on white quartz? I have your all in one and daily cleaner and they do not do the trick. Thanks

        • Shalini Rawla
          Shalini Rawla

          We recently did our kitchen with a quartz countertop. It is a U shape platform with three separate slabs. Unfortunately the middle slab connecting the two parallel slabs has puffed up on the edges. Do not know what the Mason used for epoxy but within a few months the edge has an ugly open mouth with a gaping hole. We don’t know what to do. We filled it with white cement and used a hardener and left it for 3-4 days with clamps on but that too has cracked up and the Gap is still visible. We did not have any bevelled edges to the counter top but a smooth 2 inch edge or moulding. Where has the contractor hone wrong?

        • Karen Boyd
          Karen Boyd

          A contractor chipped one of the two quartz quarter-round shelves in the tub enclosure he installed. I asked him to replace it. Instead he ground off the edges of both shelves so they are no longer shiny. I don’t mind the look. I am concerned they may stain or be damaged with use. Can you answer this query?

        • JEP

          Excellent product.wish I had known about it four years ago when I installed my granite countertops. They now have a high gloss , and smooth feeling . Much easier to maintain

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