7 Best Grout Sealers for Showers, Stone, and More


The best grout sealers repel water, resist staining and last up to a year. Since the grout is porous, a sealer needs to be added to prevent discoloration and fungus.

The best grout sealer for showers, stone and more

You can apply sealer to cured grout in a few simple steps. Thereafter, reapply once a year or as needed.

The best grout sealer

What to Consider Before Buying a Grout Sealer

Although grout sealers are easy to apply, not all products are created equal. If working in an area with high humidity or moisture, you must use a penetrating sealer.

Penetrating grout sealer

Penetrating grout sealers Has a water or mineral spirits base and contains latex or silicone particles. They absorb into the grout and fill gaps and tiny pores. You need a penetrating sealer when sealing grout in showers, bathrooms and high-moisture areas because they allow water vapor to escape the grout line. Penetrating sealers also work for unglazed natural stone tiles.

Non-penetrating grout sealer

Non-penetrating or membrane-forming Grout sealers work by creating a waterproof barrier over the grout. While these sealers will protect your grout from water damage, they don’t allow the grout to breathe, which causes mold and mildew problems in high humidity or high humidity areas. Do not use this type of sealer in a bathroom or basement.

Non-toxic grout sealer

No/Low VOC Grout Sealer Features a water base and plant-derived ingredients. Although these sealers may not be as effective as chemical-fillers, they are ideal for those sensitive to harsh ingredients.

application bottle

Once you know the type of grout sealer you need, you can choose an application type. Grout sealers come in jugs, sprays and tubes. All are easy to apply, but personal preference will dictate which one is best for you.

Best Grout Sealer Reviews

We looked at product formulations, ease of use, and user reviews to compile a list of the best grout sealers based on your needs.

Top Pick: Miracle Sealant 511 Impregnator Sealer

Miracle Sealant 511 Impregnator Sealer

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Miracles Sealant 511 Impregnator Sealer is a penetrating sealer strong enough to seal indoor and outdoor tile and grout. You can use it to seal any type of grout and it also works as a natural stone sealer for marble, slate, granite and travertine.

One pint covers up to 500 square feet. The formula is UV- and weather-resistant, ideal for outdoor kitchens and sunrooms. And because it’s a high-quality penetrating sealer, you can use it in the bathroom and around the shower, too.

Miracle Sealants 511 Impregnator Sealer has a 4.5 out of 5-star rating from 5,500 users. Most reviewers claim that this sealer is durable and easy to apply. There are few user complaints about harsh smell.


  • Works on most types of tile and grout
  • Apply grout and unglazed stone for a waterproof, durable finish
  • Ideal for indoor and outdoor applications


  • High VOC formulas produce harsh fumes
  • A couple of complaints are that the sealer has dinged the look of the light grout

Best for Showers: Clean-Ease Stone and Grout Sealer

Clean-Ease Stone and Grout Sealer

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When sealing grout in a shower, you need a penetrating sealer, otherwise you risk the possibility of molding your grout lines. Clean-Ease Stone & Grout Sealer is a good option for sealing shower and bathroom grout – it will even seal fireproof natural stone tiles.

This sealer is easy to apply: apply to the grout with a paintbrush, wait five minutes and wipe off the excess. It will protect against water and oil-based stains and has less odor.

Clean-Ease Stone & Grout Sealer has over 1,400 reviews and a 4.5 out of 5-star rating. While most users said this product was easy to use, some complained that it took 3-5 coats of sealer to create a waterproof barrier.


  • Easy application process is beginner friendly
  • Ideal for bathroom tiles, shower surrounds and natural stone
  • Low odor formula


  • It may take several coats to achieve a waterproof finish

Best spray: Black Diamond Ultimate Grout Sealer

Black Diamond Ultimate Grout Sealer

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Black Diamond Ultimate Grout Sealer comes in a spray bottle and is available in several sizes. You can use it for any color or grout. Because it’s a penetrating sealer, it’s also safe for shower surrounds and high-moisture areas.

To apply this sealer, spray it on clean, dry grout lines. Wipe off all excess spray before it dries. It may take several applications for the grout to become water-resistant.

Black Diamond Ultimate Grout Sealer has received a 4.5 out of 5-star rating from over 1,000 users. Critics love it for its ease of use and because it doesn’t lead to discoloration. A few users complain that their grout gets dirty with the sealer still in place.


  • The spray bottle is convenient for application in small areas
  • Penetrating sealer works for all types of grout lines
  • One pint covers 200-500 ln feet of grout


  • Multiple coatings will be required to create a water barrier
  • Spray bottles are cumbersome for large grout jobs

Best Grout Sealer Pen: Waterproof Grout Paint and Sealer

Waterproof grout paint and sealer

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When your grout is old, and no Amount of cleaning Bringing it to life, a grout pen is a saving grace. These pens draw grout lines, adding color and a sealant in one. You can find grout pens in many standard colors such as white, charcoal, and pearl gray.

The grout pen works like a marker – press the tip down and color your lines. Since the pen waterproofs your grout, you don’t need to seal it afterwards. If you want to add an extra layer of protection, choose a water-based penetrating sealer.

Waterproof Grout Pen & Sealer has over 400 user reviews with 4 out of 5-star ratings. Users love that these pens go from dull to fresh with little effort. Some complain that the pen is difficult to color with existing grout and the tip of the marker wears off quickly.


  • Changes the color of the grout and seals it in one step
  • Easy to use – you paint on the grout like with a marker
  • There are eleven shades to choose from


  • The tip of the pen falls off easily
  • Finding an exact shade match to your existing grout can be difficult

Best Low VOC: Seal It Green Grout Sealer

Seal This is a green grout sealer

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A major concern with most grout sealers is the high amount of VOCs they release. If you’re concerned about VOCs or sensitive to chemicals, Seal It Green Grout Sealer offers a gentler, plant-derived formula.

The formula claims to be heavy-duty but is non-toxic, has no VOCs and is water-based. It is safe for all types of grout and tiles and comes in an easy-to-use spray bottle.

Seal It Green Grout Sealer has over 300 reviews on Amazon with an average 4 out of 5-star rating. But, while most users claim that it works as advertised, many users report that the sealer didn’t work at all after multiple coats.


  • No VOC formula is non-toxic and water-based
  • Compatible with all types of tile and grout
  • Suitable for indoor or outdoor use


  • Mixed reviews about the product’s effectiveness

Best for natural stone: Aqua Mix Sealer’s choice is gold

Aqua Mix Sealer's choice is gold

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Aqua Mix Sealer Choice Gold is a no-sheen sealer for natural stone and grout. You can use it to grout and seal cement, travertine, marble, granite, limestone, slate, masonry and saltillo in one step.

Because this sealer is water-based and penetrating, it is suitable for most situations, including bathroom and shower surrounds. This will maintain the appearance of porous stone without changing its appearance or finish.

Aqua Mix Sealer’s Gold Choice has over 1,200 user reviews and a 4.6 out of 5-star rating. Users agree that this product does not change the color of grout or tiles. There are complaints about the price and the number of applications for making water-resistant barriers compared to other products.


  • Seal grout and natural stone in one step
  • Will not change color or gloss of grout or tile
  • Safe to use in food preparation areas


  • Expensive compared to other sealers
  • It may take multiple coats to achieve a proper seal

Best Tube Applicator: Miracle Sealant 6-Ounce Grout Sealer

Miracle Sealant 6-Ounce Grout Sealer

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Miracle Sealant 6-ounce grout sealer comes in a tube that users can squeeze onto the grout line. It works on sanded and unsanded grout and has a water-based penetrating formula, making it ideal for high humidity, high humidity areas.

The formula will not change the appearance or gloss of the grout and comes in a package containing two bottles.

Miracle Sealant 6-Ounce Grout Sealer has received a 4.4 out of 5-star rating from over 150 users. Reviewers claim it’s easy to use on floor tile, but because of its liquid formula, it will streak when applied to shower grout.


  • The tube applicator makes it easy to apply the floor grout
  • Works on all sanded and unsanded grout lines
  • Will not change the color or brightness of the grout


  • Its small size means users will need many bottles for a large grout job
  • Liquid formula circulates when applied around the shower

How we choose the best grout sealers

Before compiling our list of the best grout sealers, we evaluated the features users most want with grout sealers for specific areas of the home and tile types. We’ve reviewed dozens of top grout sealers, finding seven of the best that fit into the most popular categories. We looked at functionality, affordability, ease of use and user reviews.

Why trust Homeedit reviews

Homeedit is an unbiased home improvement and home decor media outlet. Since its founding in 2008, Homeedit has provided thousands of home improvement tips, reviews and ideas to help readers create beautiful homes. Our author, Katie Burton, has over ten years of experience in home improvement He aims to help readers find products that meet their expectations


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