The 6 Best Grout Sealer for Shower

When you look at your tiled shower floor or wall, you’ll notice a substance used to fill the gaps between them, and that substance is what you call a grout.

Tile grout is a mixture of cement, sand, and water, as well as added color in some cases used to fill gaps between tiles. The grout is often affected by exposure to moisture, which leads to discoloration, mildew growth, and damages. 

To avoid having a dirty grim-looking grout in your bathroom, grout sealers are used, and luckily there are a lot of them like the Dupont grout sealer, the safecoat grout sealer, and many more.

Luckily for you, this piece about the best grout sealers for the shower is here to answer the itching question of what is the best grout sealer for showers. Top 3 Recommendations

  • Ansfelden Best Overall – Aqua Mix Sealer’s Choice Gold Quart
  • buy Pregabalin steroids Runner up – Miracle Sealants 511QT6 511 Impregnator Sealer
  • Best base – Miracle Sealants GRTSLRAEROCS Grout Aerosol Spray Penetrating Sealers
Grout Sealer for Shower

The Best Grout Sealer for Shower Reviews

1. Aqua Mix Sealer’s Choice Gold Quart – Best  Grout Sealer Choice

Amongst the best is the Aqua mix sealer that stands out as the top grout sealant in the market for many apparent reasons.

Aqua Mix is a no-sheen, natural look and penetrative tile sealer that offers stain protection to your tile surface and maintains the natural stone and porous tile surface look while providing a non-slippery finish.

As a water-based formula, it is the perfect granite sealer that works well with porcelain tiles, limestone, cement, masonry, travertine, saltillo, marble, and other stone surfaces.


  • Provides maximum stain protection
  • Easy to apply with good coverage
  • Lasts up to 10-15 years
  • Gives a non-slippery finish


  • It’s quite expensive

2. Miracle Sealants 511QT6 511 Impregnator Sealer – Best Penetrating Grout Sealer

In need of something that will get your porous surfaces properly sealed, Miracle Sealants 511QT6 Impregnator is here for you.

With a formula that is oil, slip, and water-resistant, the solution is a good grout sealer for a variety of surfaces, including sanded grout,  porcelain and glazed tiles, slate, granite, and many more.

Furthermore, the formula offers coverage and provides maximum protection against stains. Plus, it is UV transparent, resists weather elements, and covers up to 1,000 square feet per quart, working fine for both interior and exterior surfaces. 


  • Weather, oil, slip, and water-resistant
  • UV transparent
  • Designed to protect grout joints fully


  • Strong smell

3. Miracle Sealants GRTSLRAEROCS Grout Aerosol Spray Sealers – Best Grout Sealing Spray

In need of a more practical sealing grout that will keep your grout sealed and get all your thin grout lines, try the Miracle GRTSLRAEROCS aerosol model perfect for sanded and unsanded, old or natural stone surfaces as well as multi-hard surfaces.  

Being the best spray-on model, it covers up to 250 linear square feet easily and has an immediate effect with the easy spray-on application.

Also, as a UV transparent and weather-resistant product, you can use it to seal grout without worries of it going yellow. Protects from grout stains.


  • Perfect for multiple hard surfaces
  • Weather-resistant 
  • Easy and quick use


  • Excess sealer can lead to haze on nearby surfaces

4. Black Diamond Stoneworks Ultimate Grout Sealer – Best Multipurpose Sealant

The Black Diamond Grout Sealer is an effective grout sealer with fitting for many surfaces.

As a low odor acid-free formula, Black Diamond offers protection against staining from coffee, food, oil, wine, and dirt, perfect for ceramic tiles, marble, and more. Plus, it is the right grout sealer for commercial and professional use.

What’s more, it is safe for white and colored grout offering long-lasting protection with a super-easy application to the grout lines.


  • Easy application
  • Fast-drying and long-lasting
  • Low odor


  • Only works on a small coverage area

5. StoneTech Heavy Duty Grout Sealer – Best for Large-scaled Jobs

StoneTech Heavy Duty is one of the top grout sealers perfect for a large-scaled grout layer protection.

With a coverage range of up to 1,000 linear ft per gallon, the StoneTech is tough, heavy-duty protection against oil and water-based stains on the grout line.

Being water-based, the product offers superior protection and makes grout cleaning much easier with a special design application to cement-based grout with natural stone, porcelain, and ceramic tile. Moreover, it is perfect for indoor and outdoor use.


  • Offers heavy-duty protection
  • Spreads easily on the surfaces
  • Provides full protection from dirt and water stains


  • Complaints of it darkening the grout

6. Tuff Duck Granite, Grout, and Marble Sealer – Best for Marble Surfaces

Is your surface a marble surface? Then the Tuff Duck Grout Sealer should be your best friend.

Designed to offer full-on protection for marble, granite, slate, travertine, limestone, and even concrete surfaces, the penetrative and spray-on sealer is a non-acidic formula that provides coverage for up to 800 sq feet.

Furthermore, the sealer guarantees zero effect on the natural looks of the delicate marble and quartz stones. It offers a long protection range of up to 5 years for interior surfaces and about 3 years for exterior surfaces.


  • Great protection for marble and granite surface
  • More pocket friendly
  • Low odor with a non-acidic formula


  • Not so long-lasting with more porous surfaces

Buying Guide: Tips to Purchase Best Grout Sealer for Shower

Grout type 

A tile grout could either be a cement-based grout or an epoxy grout. Cement-based sanded grout is made from a mixture of water, cement, and sand; the composition is quite porous, susceptible to water, grease damage, mold, and dirt, and requires a grout sealer to keep it sealed and protected.

The Epoxy grout, on the other hand, is epoxy resin combined with filler powders. This type is non-porous, more durable, and requires no grout sealer, but it looks quite artificial and pricey to install.

The toxicity

Grout sealers could be solvent-based sealers or water-based grout sealers. A solvent-based sealer contains heavy and harmful chemicals such as volatile organic compounds that can cause a lot of damage if inhaled and should be handled carefully and placed away from heat or fire.

The Water-based sealer is a much safer alternative with lower levels of volatile organic compounds. The water-based formula grout sealer is more effective, and as surface-level protection, it won’t penetrate deeply into the porous grout.

Types of grout sealers

There are 2 grout sealers: the penetrating grout sealers and the non-penetrating sealers/ membrane forming grout sealers. 

The penetrating sealer, also known as the impregnating sealer, is the perfect grout sealer for long-term water, mildew, and oil damage protection. 

This sealer comes in both colorless and colored options, protects and prevents the moisture sipping into the grout by sealing the grout pores, all the while without changing the grout’s natural appearance,  and often lasts for about 3-5 years.

The membrane-forming grout sealer or the surface coating is more of a basic layer of protection of the grout from exposure to moderate grease, water, and dirt. Unlike the penetrative version, it requires yearly application and works better with grout for unglazed tiles and natural stones rather than the glazed tiles. 

Application type

When it comes to applying grout sealer, you could work with a spray-on formula, the ready-to-apply tubes, or the larger quart and gallon-sized containers that would require the use of a sponge or rag for application.

Keep in mind that there are many surfaces to cover when you have to apply a grout sealer, and the likes of the grout sealer spray are efficient and consistent, the tube of grout sealer is convenient, and the best, of course, is the gallon-sized containers.

Frequently Asked Questions

What Type of Grout Sealer to Use in a Shower?

There are a number of different types of grout sealers that you can use in your shower. For the most part, people really like Tuff Duck, Black Diamond, Aqua Mix, and Miracle. Each of these provides you with an excellent finish and make sure that the end result is high quality. After all, you want to make sure you have a good seal, and your bathroom continues to look great, right? That means finding something quality for shower walls. But remember that each of these can work well in the right conditions.

What Kind of Grout Sealer is Best?

If you’re looking for the absolute best in the way of grout sealer, you should take a closer look at Black Diamond or Tuff Duck. These two brands have great rankings with just about everyone, and they definitely can provide you with a good quality seal. Also, when you’re done with them, you’re barely even going to notice that they’re there (other than the fact that your bathtub or shower is a whole lot better sealed than it was before.

Do You Need Grout Sealer for Shower?

Considering the fact your tile grout is constantly exposed to moisture, dirt, and grease, the need for a grout sealer cannot be overstated.

Aside from keeping your grout clean and hygienic, the best grout sealer for a shower also helps extend the grout work’s lifespan. There a grout sealant is quite vital for every shower. 

by Karens
Karens is a busy mother of two and addicted to studying, researching bathroom and toilet decoration.

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