The Best Grout Sealers for Shower Floors and Walls

Updated by Lynda Stevens

I understand that things don’t last forever, and it applies even to shower grouts. I’ve fixed grouts over the years because they fell off or have become full of grime. Some of my shower areas had stains, molds, and mildews. Instead of hiring a professional for re-grouting, I’ve unleashed my DIY self from time to time.

I noticed that I have a collection of grout sealers because I’ve been searching for a high-quality shower grout sealer. It’s a plus if I can also use it in my kitchen and other areas. Like many people, I want my shower area to be spic and span. I prefer a healthy bathroom without stains, molds, and mildews forming on the grouts.

Check my list of the best grout sealers for the bathroom.

If I have to choose among the grout sealers I used, I will have to go with the Miracle Sealants 511 Impregnator because it’s water and stain-resistant. It’s durable, long-lasting, and doesn’t change the natural look of my shower.

The Best Grout Sealers for Showers Are:

ProductDetails
1.Miracle Sealants GRT SLR 6 Ounces Grout Sealer

  • Weather-resistant
  • Convenient application
  • Easy and safe to use
  • Multifunctional
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2.Aqua Mix Sealer's Choice Gold Quart

  • Natural look, no sheen
  • Water-based formula
  • Pre-grouting sealer
  • Ideal for masonry, Saltillo, travertine, marble, granite, limestone, slate, porcelain, and cement
  • Stain protection
  • Water-resistant
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3.TuffDuck Granite, Marble, and Grout Sealer

  • Excellent protection for concrete, granite, travertine, marble, slate, and limestone
  • Protects the natural appearance of quartz and other delicate stones
  • Ideal sealing with a single coat
  • Long-lasting with up to three years protection for exterior surfaces and five years for interiors
  • Non-acidic formula
  • Coverage for up to 800 sq. ft.
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4.Miracle Sealants TSS QT SG Stone/Tile and Grout Economical Sealer

  • Protection for masonry, grout, brick, ceramic tile, concrete, quarry tile, terrazzo, marble, and granite
  • For use inside and outside of the house
  • Excellent coverage and safe for food areas
  • Weather-resistant and stain-resistant
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5.Black Diamond Grout Sealer

  • Long-lasting protection
  • Water-based
  • Stain-resistant
  • Professional results
  • Money-back guarantee
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6.Miracle Sealants 511 Impregnator

  • Indoor and outdoor use
  • Ideal for various surfaces such as ceramic, porcelain, and glazed tiles, sanded grout, concrete, marble, slate, travertine, terrazzo, granite, and others
  • Water-resistant, stain-resistant, anti-slip
  • Excellent coverage for 1,000 square feet per quart
  • Safe even for food preparation areas
  • Oil-based
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7.SafeCoat Grout Sealer

  • Excellent water resistance for at most five years upon proper application
  • Non-offensive odor
  • Safe to use even by the chemically sensitive
  • Zero VOC content, and meets all air quality regulations
  • Doesn’t contain formaldehyde
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8.StoneTech Heavy Duty Grout Sealer

  • Heavy-duty
  • Stain-resistant
  • Protects grout for easy cleaning of the shower
  • Doesn’t change the natural look of the grout
  • Long-lasting up to three years before re-application
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9.Miracle Sealants Plus QT SG 511 Porous Plus Penetrating Sealer

  • All-weather grout sealer
  • Ideal for sanded grout, terra cotta, sandstone, flagstone, and limestone
  • Water, oil, and stain resistant
  • Anti-skid formula
  • Safe to use even in food preparation areas
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1. Miracle Sealants GRT SLR 6 Ounces Grout Sealer

Whenever I try anything new, I always search for a product that’s convenient to use. Searching for the best grout sealer for a shower is no exception. The easy to apply bottles come with an applicator tip. I like that it’s weather-resistant, so I don’t have to worry about the weather affecting the sealer. Moreover, it works even during the winter.

Unlike other sealants, I didn’t have to buy different grout sealers for the interior and exterior surfaces. I save a lot of money because it’s multipurpose, and a 6-ounce bottle can cover up to 115 square feet of shower space. However, it isn’t an industrial-strength sealer, which means that it’s for touch-ups and not for re-grouting or first time grouting your entire house.

Specs

  • Weather-resistant
  • Convenient application
  • Easy and safe to use
  • Multifunctional

Pros

  • Applicator tip excellent for bathroom floors
  • Requires only two coats
  • Quick-drying
  • Economical

Cons

  • A little runny
  • Too thin for sealing vertical surfaces

If you’re a do-it-yourselfer, you’ll like the Miracle Sealants GRT SLR 6 Ounces Grout Sealer because you don’t need any special skills to use it. It comes with an applicator tip for easy touch-ups of your bathroom tiles.

You also save money because it’s an all-weather grout sealer. You don’t have to buy a separate sealant for your outdoor grouts. However, it’s only for sealing re-grouts and not for the first time grouting the entire home.

Overall Rating: 4.3

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2. Aqua Mix Sealer’s Choice Gold Quart

I asked a contractor for some recommendations for grout sealers because I wanted to re-grout a shower upstairs. He said I should get the Aqua Mix Sealer’s Choice Gold Quart because it offers extensive protection and gives the bathroom grouts a natural look. I like that it’s water-based, quick-drying without the sheen finish. I used it as a pre-grout sealer on my ceramic tiles, and I have no issue about it.

This grout sealer is also non-toxic because the instructions said that it’s ideal for food preparation and serving areas. Now, if it isn’t safe to use, it won’t apply to areas where we have food, will it? I like that it doesn’t affect the overall look of my shower area because it’s colorless. I have different themes in each part of my home, and I’m happy that I don’t have to buy grout sealers separately for each pattern.

If there’s one disadvantage that I can think of about this product, it’s going to be its cost. It’s expensive but, if I think about it, it’s money well worth it because it’s a quality product.

Specs

  • Natural look, no sheen
  • Water-based formula
  • Pre-grouting sealer
  • Ideal for masonry, Saltillo, travertine, marble, granite, limestone, slate, porcelain, and cement
  • Stain protection
  • Water-resistant

Pros

  • Economical
  • Easy to clean
  • Quick-drying

Cons

  • Expensive
  • Needs at least two coats

If you’re thinking about buying a high-quality grout sealer for your shower area, you may try the Aqua Mix Sealer Gold because it’s long-lasting. It has excellent value for money and is easy to apply. However, if you’re on a tight budget, you may have to look elsewhere.

Overall Rating: 4.5

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3. TuffDuck Granite, Marble, and Grout Sealer

I like this grout sealer because it protects my grouts without affecting the appearance of my shower. In a single coat, it offers the required protection for my bathroom. According to the manufacturer, the sealer will last for five years in my shower and three years for exterior surfaces. I haven’t tried it outdoors, so I can’t say how it works. However, for my shower area, I’m pleasantly pleased with the results.

I also like that the TuffDuck Granite, Marble, and Grout Sealer is non-acidic, so it protects concrete and natural stones. It penetrates to the bottom of the grout for excellent protection against bacteria and moisture. It’s a versatile sealer with a high-quality appeal. One flaw that I discovered about this product is its strong smell. I had to open the windows to let the odor dissipate.

Specs

  • Excellent protection for concrete, granite, travertine, marble, slate, and limestone
  • Protects the natural appearance of quartz and other delicate stones
  • Ideal sealing with a single coat
  • Long-lasting with up to three years protection for exterior surfaces and five years for interiors
  • Non-acidic formula
  • Coverage for up to 800 sq. ft.

Pros

  • Convenient to use
  • Doesn’t affect the color pattern of the shower area because it’s colorless
  • Easy to wipe off excess
  • Easy to follow instruction

Cons

  • Strong smell when wet
  • Expensive

If you want an economical grout sealer that only needs a single coat to provide maximum protection, you may prefer the TuffDuck Granite, Grout, and Marble Sealer. While it’s true that it’s expensive if you’re on a tight budget, but if you think about it, you only need one coat for your grout, so it’s money well spent.

Overall Rating: 4.2

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4. Miracle Sealants TSS QT SG Stone/Tile and Grout Economical Sealer

I like the Miracle Sealants TSS SG because it penetrates the grouts well to create a barrier against moisture and stains. I used it in my shower area, and I’m planning to cover my kitchen grouts as well because it’s fabulous for both interiors and exteriors. It’s for homeowners who prefer to fix minor issues around the house instead of hiring a professional. I discovered it to be effective in my shower, and it doesn’t change the overall natural look of the area.

It’s also economical because a quart of this product will cover about 1,500 square feet. However, unlike other grout sealants in this review, you’ll need to apply at least two coats to achieve the result that you want.

Specs

  • Protection for masonry, grout, brick, ceramic tile, concrete, quarry tile, terrazzo, marble, and granite
  • For use inside and outside of the house
  • Excellent coverage and safe for food areas
  • Weather-resistant and stain-resistant

Pros

  • Easy to clean
  • Convenient to use

Cons

  • Isn’t anti-slip
  • Needs at least two coats

Another product that you may want to try is the Miracle Sealants TSS QT SG Stone/Tile and Grout Economical Sealer if you wish to seal the grouts in your bathroom tiles. You may also use it in your kitchen because it’s nontoxic. However, you have to apply at least two coats for optimal coverage.

Overall Rating: 4.0

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5. Black Diamond Grout Sealer

I like the Stoneworks Grout Sealer because it’s uncomplicated to apply due to its flip-top cap. It’s water-based and, unlike the other sealants, it doesn’t have a strong smell. It’s straightforward to clean too, so it didn’t leave my shower area messy. It’s an excellent protector against stains, oil, and dirt. It looks as if a professional did it for me.

What’s truly surprising about this product is that it has a money-back guarantee; but, I didn’t get to use it because it worked well in sealing my shower grouts.

Getting this product is an excellent decision because if it doesn’t meet your requirements, you can quickly return it. This multipurpose grout sealer isn’t only suitable for bathrooms, but kitchens and countertops as well. However, you may have to apply at least two coats to ensure that it seals the grout properly.

Specs

  • Long-lasting protection
  • Water-based
  • Stain-resistant
  • Professional results
  • Money-back guarantee

Pros

  • Easy to apply
  • Low odor
  • Easy to clean
  • Doesn’t affect the color of the grouts and tiles
  • Clear instructions

Cons

  • Needs at least two coats

If you’re looking for an efficient grout sealer for your bathroom, you may try Stoneworks Grout Sealer to achieve professional results. You’ll discover how easy it is to apply, and you can easily wipe off any excess. It’s inexpensive, unlike the other sealers, but you may need at least two coats to soak up the entire grout.

Overall Rating: 4.1

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6. Miracle Sealants 511 Impregnator

Miracle Sealants 511 Impregnator is all-weather, water-resistant, stain-resistant, and anti-skid without changing the overall look of your shower. Although it has a high chemical content, it meets the VOC requirements. It is durable and long-lasting. A 32-ounce bottle is enough for 125 square feet.

I like that it’s UV transparent, and safe even for my kitchen tiles, where I prepare food. It protects my tiles from stains and moisture and prevents the growth of molds and mildews. You’ll notice that water-based sealants especially shield the surface, unlike the oil-based Impregnator, which goes deep into the grout.

One thing that I don’t like about this product is its foul odor. As I’ve mentioned earlier, it has more chemical content than the other types of sealers. It’s the tradeoff when you want a sealer that penetrates deep into the grout. What I can advise is for you to open the windows to let the smell dissipate. Stay out of the shower area for a few hours too.

Specs

  • Indoor and outdoor use
  • Ideal for various surfaces such as ceramic, porcelain, and glazed tiles, sanded grout, concrete, marble, slate, travertine, terrazzo, granite, and others
  • Water-resistant, stain-resistant, anti-slip
  • Excellent coverage for 1,000 square feet per quart
  • Safe even for food preparation areas
  • Oil-based

Pros

  • Convenient to use
  • Easy to clean
  • Quick-drying

Cons

  • Foul smell
  • Needs recoating after a couple of years or when water no longer beads

If you’re searching for a grout sealer that works, you may use the Miracle Sealants 511 Impregnator because it goes deep into the grout to protect your shower area from moisture, stain, and molds.

It even has an anti-skid formula that helps prevent accidents while bathing. However, you have to endure the foul smell while applying. You may open the windows to let the odor dissipate.

Overall Rating: 4.4

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7. SafeCoat Grout Sealer

The selling point of the SafeCoat Grout Sealer is that it doesn’t emit toxic fumes because it exceeds all air quality regulations. It sets the bar too high for numerous brands that still use formaldehyde in their solutions. For me, this feature tops all the other selling points of all grout sealers because I often complain about the foul smell of grouts and sealers that I use in-home repairs.

Safecoat Grout Sealer is excellent in preventing moisture through the grouts that can cause the growth of molds and mildews. It also doesn’t discolor the tiles or the grout as long as you wipe the excess right after application. Although I haven’t experienced it, in many product reviews that I read, customers complain about poor customer service. They tried contacting the manufacturer, but no one answered.

Specs

  • Excellent water resistance for at most five years upon proper application
  • Non-offensive odor
  • Safe to use even by the chemically sensitive
  • Zero VOC content, and meets all air quality regulations
  • Doesn’t contain formaldehyde

Pros

  • Easy to apply
  • Easy to clean
  • Slight odor while applying, but no longer smells after an hour
  • Water beads up after 24 hours of curing

Cons

  • Poor customer service

If you’re tired of the toxic odors that many grout sealers emit, you’ll be happy to know that SafeCoat Grout Sealer has zero VOC content. The product is safe for use even if you or any member of the family is chemically sensitive. For me, it’s the selling point of this product.

Of course, it also effectively seals the grout to make it water and stain-resistant. However, if you have issues to take up with the manufacturer, you may have trouble contacting them because they have poor customer service.

Overall Rating: 4.1

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8. StoneTech Heavy Duty Grout Sealer

Another product that is worth a try is the StoneTech Heavy Duty Grout Sealer, and it works best on grouts of ceramic and porcelain tiles. It has a water-based formula that protects the grouts from moisture, stain, and oil. I had an easier time cleaning the shower area because of it. The product is an all-weather grout sealer solution for both indoor and outdoor structures. Aside from it being efficient, it’s also economical and affordable.

One flaw of the StoneTech Heavy Duty Grout Sealer is that it tends to drip when I used it on vertical tiles, but I was able to wipe it off quickly.

Specs

  • Heavy-duty
  • Stain-resistant
  • Protects grout for easy cleaning of the shower
  • Doesn’t change the natural look of the grout
  • Long-lasting up to three years before re-application

Pros

  • Excellent performance if used liberally
  • Easy to wipe off excess sealer
  • Protects against molds and mildew
  • Beads water effectively

Cons

  • Can drip when applying on vertical tiles
  • Some customers complain that it changed the colors off their grouts

This grout sealer is ideal if you have porcelain or ceramic tiles. It’s water-based and provides heavy-duty protection. You can have grouts that are stain, water, and oil resistant.

You’ll also like that you’ll spend less time cleaning your shower because the grouts don’t attract molds and mildew growth. However, you have to do some cleaning on vertical tiles because the formula tends to drip.

Overall Rating: 4.3

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9. Miracle Sealants Plus QT SG 511 Porous Plus Penetrating Sealer

Another practical choice for grout sealers is the Miracle Sealants 511 Porous Plus Penetrating Sealer because it’s an all-weather that I use for interior and exterior surfaces.

It has excellent dirt and water resistance and is safe enough for food preparation areas. It deflects moisture, so there’s no chance for molds and mildews to proliferate. Moreover, I like that it doesn’t alter the appearance of my shower surfaces.

However, just like other grout sealers, it has a foul-smelling odor during application. I had to open the windows to let the smell dissipate. If you or any of your family members are sensitive to chemicals, you may not like this product because of the toxic smell that it emits. You may ask a professional to do the sealing for you.

Specs

  • All-weather grout sealer
  • Ideal for sanded grout, terra cotta, sandstone, flagstone, and limestone
  • Water, oil, and stain resistant
  • Anti-skid formula
  • Safe to use even in food preparation areas

Pros

  • Excellent for very porous surfaces
  • Beads water effectively
  • Easy to apply
  • Quick-drying

Cons

  • Expensive
  • Strong smell

The Miracle Sealants 511 Porous Plus Penetrating Sealant can be your grout sealer of choice. However, if you’re sensitive to chemicals, you may skip it or hire someone else to do the job.

You’ll like its water, oil, and stain resistance properties because it ensures that you don’t have molds and mildews growing in your shower area. It’s also safe to use in your kitchen grouts.

Overall Rating: 4.4

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Shower Grout Sealer Buying Guide

You’ll find different grout sealers in stores, and it’s ok if you feel that choosing among them is confusing. Let me help you with some tips on how you can choose the best grout sealer for shower requirements.

Generally, you use a penetrating sealer if you are setting up grout and tiles for the first time because it lasts longer and requires less maintenance. For a matte or glossy finish, you have to apply a topical coating sealer.

Penetrating sealers don’t give you the extra shine, although they’re excellent in protecting your grout against dirt. Moreover, they’re not suitable for terracotta, slate, or any porous surfaces.

Let’s take a look at what to look for when you’re searching the market for a shower grout sealer.

Application Type

If you check your local store or even online, you’ll discover that you’ll find grout sealers in quarts, gallons, ready-to-apply tubes, and spray-on formulas. Some of them require a sponge or rag for application.

If you’re thinking of sealing your grout, consider the square footage that you have to cover. A tube may not be a convenient choice if you’re covering a large area. Spray-on formulas may offer a consistent layer over the surface, but if you’re after value for money, the big containers are most economical.

Solvent-Based vs. Water-Based

Water-based grout sealers don’t deeply penetrate if you have a porous surface, but they provide excellent surface-level protection. They also don’t have toxic odors, unlike some solvent-based grout sealers.

On the other hand, if you’re after deep grout conservation, you can’t go wrong with a solvent-based impregnator sealer because it penetrates deeply and protects your grouts from the inside.

Surface Type

You’ll also notice that some grout sealers only work on a few surfaces. Some work best on cement and granite, while other sealers are ideal for natural stones. If you don’t want to damage your tiles, you have to ensure that you purchase a grout sealer with a non-corrosive formula. If the surface that is small to seal then try to hide the surface using a shower essential such as shower caddies or waterproof shower speaker

Moreover, if you also plan to fix grouts in your kitchen or food preparation area like a bar top or counter, you have to choose a non-toxic and safe grout sealer. If the surface is not working then try a cleaner and then try the sealant. 

Durability

No one wants to reseal a grout every few months because that’s tiring and expensive. You don’t want to waste money, time, and effort for repairing your shower, so you must ensure that you purchase an excellent grout sealer that lasts a long time. For instance, you can search for a product with a five-year guarantee, so you won’t have to fix the seals frequently.

Appearance

Another factor to consider is the appearance of your shower flooring. You don’t want your high-quality bathroom tiles to look bad because you chose a cheap sealer.

In essence, you have to opt for a grout sealer that will enhance the durability and looks of your tiles. Water and oil can stain your shower floors, especially if you don’t clean them right away. If you have an excellent grout sealer, you have an assurance that your tiles remain stain-free. If the application of the sealant looks obvious then try some cool shower curtains to hide it. You just have to get creative to make it look good. 

Final Thoughts

I prefer the Miracle Sealant 511 Impregnator. After all, it offers maximum coverage because it’s water-based. Also, it’s durable, so I don’t have to re-apply it every few months. I also like that it doesn’t alter the natural look of my shower.

Check out also our article on the best grout for showers.

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