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10 Best Grout Sealers of 2021 — Reviews & Top Picks

Stella Sealants Ultra Dry 70 - Stone Sealer in the poolside

Stella Sealants Ultra Dry 70 - Stone Sealer in the poolside

We all hate the look of stained tiles. But if you don’t protect your surfaces by applying the right grout sealer, the same fate awaits yours. The good news is that the market is flooded with many great options to help you avoid this catastrophe. Unfortunately, with so many options to choose from, the search for the right sealer for your needs can be long and frustrating.

Luckily for you, we perfectly understand the situation. And that’s why we did the heavy lifting to bring you these reviews of the best grout sealers in 2020. We are also throwing in a buyer’s guide to make sure you go home with the right product.

A Quick Comparison of Our Favorites

Rating Image Product Details
Best Overall
Winner
Miracle Sealants 511GAL4 511 Impregnator Sealers Miracle Sealants 511GAL4 511 Impregnator Sealers
  • 20-year warranty
  • Interior and exterior applications
  • Easy to apply
  • Best Value
    Second place
    StoneTech Heavy Duty Grout Sealer StoneTech Heavy Duty Grout Sealer
  • Value for money
  • Indoor and outdoor application
  • Water-based
  • Premium Choice
    Third place
    Black Diamond Stoneworks GRANITE SEALER Black Diamond Stoneworks GRANITE SEALER
  • Low odor
  • Easy to apply
  • Low VOC
  • AQUA-X PGS16O Grout Sealer AQUA-X PGS16O Grout Sealer
  • Easy to apply
  • Low VOC
  • No foul odor
  • Tuff Duck Grout Sealer Tuff Duck Grout Sealer
  • Non-acidic formula
  • Low odor
  • Wide coverage
  • The 10 Best Grout Sealer – Reviews 2021

    1. Miracle Sealants 511GAL4 511 Impregnator Sealers – Best Overall

    With just a tray, a miracle applicator, and a clean towel, you can protect medium to dense porous surfaces without altering their natural look. Whether you are using it for exterior or interior applications, this sealer will work with most types of surfaces, including ceramic tiles, granite, and marble. However, porous surfaces will require a second application for maximum results.

    It works by forming an invisible protective layer to keep stains and moisture out of the grout surface while still allowing vapor to escape. You can use the surface for normal foot traffic after two to five hours. But you should wait for at least 24 hours to let it dry completely.

    The best thing about the Miracle Sealants 511GAL4 511 Impregnator Sealer is that it includes a 20-year warranty to protect buyers from faulty materials and poor workmanship. The only drawback we found is the high volatile organic compound (VOC) levels in the product. Therefore, you may need to keep small children and pets away until it dries completely. You should also ensure the room is properly ventilated to protect yourself from the toxic fumes during application.

    Pros
    • 20-year warranty
    • Interior and exterior applications
    • Easy to apply
    • Will not alter the grouts natural look
    Cons
    • High VOC

    2. StoneTech Heavy Duty Grout Sealer – Best Value

    StoneTech Heavy Duty Grout Sealer

    If you’re looking for the best grout sealer for the money, perhaps the StoneTech Heavy Duty Grout will tickle your fancy. The water-based sealer is specially designed to protect cement-based grout, ceramic, natural stone, and porcelain tiles from water and oil stains without altering their natural look. And it is durable enough to be used both indoors and outdoors.

    The process of application is easy. With a quality paintbrush, you can cover up to 1,000 linear feet per gallon. Just make sure there are no waxes or coating on the surface and ensure you clean and dry the surface before applying. After application, wait for 72 hours for the surface to dry completely.

    Due to the harmful nature of the chemicals, you should keep small children and pets away until the surface is completely dry. In the same breath, you should ensure the area is well ventilated if you are working indoors to avoid inhaling the harmful chemicals. If applied properly, this sealant can last for three to four years. However, you will need to apply two or three layers for maximum results.

    Pros
    • Value for money
    • Water-based
    • Indoor and outdoor application
    • Easy to apply
    Cons
    • Needs multiple layers to be effective
    • High VOC

    3. Black Diamond Stoneworks GRANITE SEALER – Premium Choice

    Black Diamond Stoneworks GRANITE SEALER

    This water-based sealer is designed to protect against food, wine, ink, grease, coffee, and other types of stains, and it will work for a variety of surfaces, including grout, concrete, natural stone, granite, brick, and slate. Since it only produces a low odor that dissipates almost immediately, you don’t have to worry about closed windows or poor ventilation when applying it indoors.

    The process of application is made simple by the spray nozzle fitted on the bottle. You only need to spray it uniformly across the entire surface and then use a clean towel to wipe off the residue after three minutes. After applying the appropriate number of coats, leave it for two to five hours to dry completely.

    If you have small children and pets running around the house, you can rest easy since the Black Diamond Stoneworks Granite Sealer is non-toxic. That also makes it safe to use in the kitchen or dining area. The only problem we had with this sealer is that it won’t cover a large area.

    Pros
    • Low odor
    • Easy to apply
    • Low VOC
    • Fast drying
    Cons
    • Small coverage

    4. AQUA-X PGS16O Grout Sealer

    AQUA-X PGS16O Grout Sealer

    Do you want to prevent mold and mildew from building up on grout in your bathroom, kitchen, shower, or tile flooring, this sealer might be just what you need. It will protect your surfaces without changing their natural appearance. With the 16 ounces of liquid, you can cover an area of up to 75 square feet.

    This sealer is easy to apply thanks to the spray nozzle that comes with the bottle. It works as a shield to protect water from penetrating through the surface, allowing it to bead up and roll off instead. For uniformity, you should wipe off the drips with a clean towel after application. If mold and mildew have already formed, make sure to remove them before application.

    You should not expect to smell any foul odor when using this sealer. The low VOC also protects you from harmful toxins that could affect your respiratory system. However, the AQUA-X PGS16O Grout Sealer is non-penetrating, and you may need to reapply it after a while.

    Pros
    • Easy to apply
    • Low VOC
    • No foul odor
    • Can cover 75 square feet
    Cons
    • Non-penetrating

    5. Tuff Duck Grout Sealer

    Tuff Duck Grout Sealer

    The Tuff Duck Grout Sealer will work best for porous surfaces such as slate, travertine, terrazzo, limestone marble, and granite. You can use this penetrating sealer to protect them from water and oil stains without changing their natural appearance. When applied properly, it can last for up to five years on interior surfaces and two years on external surfaces.

    For maximum effect, you should apply the sealer on the porous surface liberally (until the surface can’t absorb any more liquid) and allow it to soak for about 20 minutes before wiping off the excess with a clean towel. Then wait for 24 hours for it to dry completely.

    Made from water-based fluoropolymers, this non-acidic formula produces a very low odor that dissipates after a while. You can cover up to 200 square feet with the 32 ounces of liquid, but the amount you apply will depend on the porosity of the material. With more porous surfaces, you may require frequent applications.

    Pros
    • Non-acidic formula
    • Low odor
    • Wide coverage
    • Water-based
    Cons
    • May require frequent reapplication for more porous surfaces
    • Application not easy

    6. Grout-EEZ Tile & Grout Cleaner

    Grout-EEZ Tile & Grout Cleaner

    With this water-based sealer, you don’t need to get on your hands and knees during application. Instead, you can reach your grout, marble, limestone, slate, and travertine using a paintbrush attached to a broom pole.  After application, you should wait for 5 minutes before wiping off the residue with a clean towel. The manufacturer also recommends cleaning the surface with a neutral PH cleaner to avoid breaking the sealer down.

    Whether you are using it on white or colored surfaces, you can protect them from stains without altering their natural color. Additionally, the one-quart bottle will cover an area of about 500 square feet, but it will also depend on how porous the surface is. This sealer is safe to use around the kitchen and dining area, thanks to its low VOC levels and no foul odor. However, it runs off easily, and you may need multiple coats to achieve your desired results.

    Pros
    • Water-based
    • Easy to apply
    • Wide coverage
    • No Foul Odor
    Cons
    • Runs off easily
    • Requires multiple coats

    7. Aqua Mix Sealers Choice Gold

    Aqua Mix Sealers Choice Gold

    The Aqua Mix Sealers Choice Gold will protect your limestone, granite, slate, marble, cement, and porcelain from water stains while still retaining their natural look. You can use it for interior and exterior applications, and its low VOC levels make it safe to use around the kitchen and dining area. Moreover, you don’t have to worry about safety if you have small kids and pets around the house.

    If the foul odor on grout sealers irritates you, you can relax because this water-based penetrating sealer only produces a low odor that dissipates almost immediately. Expect the sealer to hold up for a long time to come. In fact, the manufacturer claims the sealer can last up to 15 years. The 32 ounces of liquid will go a long way. But you may require multiple applications to get the desired results.

    Pros
    • Great coverage
    • Low odor
    • Low Voc
    Cons
    • Expensive
    • Requires multiple applications

    8. Seal It Green® Xtreme Impregnating Grout Sealer

    Seal It Green® Xtreme Impregnating Grout Sealer

    If you are environmentally conscious, you will love the Seal It Green® Xtreme Impregnating Grout Sealer. This water-based sealer with plant-based surfactants has zero VOC and no odor. That means you can use it in the kitchen and dining area without worrying that it will contaminate the food. It also makes it safe to use in the presence of small kids and pets.

    The sealer is easy to use thanks to the spray nozzle attached to the bottle, and it will work with different surfaces, including tile, granite, natural stone, and marble. After cleaning and drying the surface, spray generously and leave it to dry.

    With the small bottle, you can cover an area of about 100 square feet. However, you may need to apply several coats to achieve the intended results. Moreover, we also felt the sealer was quite expensive, based on the size of the bottle.

    Pros
    • Zero VOC
    • No odor
    Cons
    • Small bottle
    • Expensive
    • Requires multiple applications to be effective

    9. AFM 31203 Safecoat Grout Sealer

    AFM 31203 Safecoat Grout Sealer

    If you have respiratory sensitivities, the AFM 31203 is a perfect fit since it has a low odor that diffuses as quickly as it came. Therefore, you don’t have to worry about ventilation when using it indoors. Moreover, the environmentally-friendly sealer has zero VOC and does not contain formaldehyde. That makes it a safe product to use in the kitchen and dining area since it will not contaminate the food. And you don’t need to worry about safety when you have small children and pets.

    AFM has tried and succeeded in creating a non-toxic product. However, we felt that the sealer is not as effective as it ought to be. For a sealer with a capacity of 32 ounces, you can only cover a small area. The sealer is also not durable enough for outdoor applications, and you need to apply multiple coats for it to be effective.

    Pros
    • Zero VOC
    • Low odor
    Cons
    • Not as effective
    • Cannot be used outdoors
    • Small coverage

    10. Stella Sealants Ultra Dry 70 – Stone Sealer

    Stella Sealants Ultra Dry 70 - Stone Sealer

    The Stella Sealants Ultra Dry 70 is perfect for sealing natural stones such as granite, travertine, marble, and limestone. And it protects them from stains, mold, and mildew without interfering with their natural look. You can use it for both interior and exterior applications.

    This water-based sealant has low VOC levels and is thus safe to use around kids and pets. Similarly, it won’t contaminate food when applied in the kitchen and dining area. And if you’re worried about quality, the manufacturer offers a 100% satisfaction guarantee that allows you to return the product in case you find it defective.

    However, we had several reservations about the sealer. For starters, we found the smell to be quite irritating, especially because it does not dissipate quickly. Secondly, frequent application is necessary to achieve the desired results since it does not last as long as it should. Lastly, the sealer is likely to leave marks on the surface if you don’t clean it properly.

    Pros
    • 100% satisfaction guarantee
    • Low VOC
    Cons
    • Smell that doesn’t dissipate easily
    • Requires frequent applications
    • Will leave marks on surfaces if not cleaned

    Buyer’s Guide

    After going through our reviews of the best grout sealers, you are probably wondering what you should consider to pick the right sealer for your needs. We prepared the following buyer’s guide to tell you just that.

    Types of Grout

    Not all grout require sealing. Grout made from epoxy resins, and filler powder are strong, durable, and easy to clean. It is also non-porous and doesn’t require sealing. However, such grout is expensive to install and doesn’t look as good. Contractors also don’t like it because it is harder to install. On the other hand, cement grout is cheaper, easier to install, and more aesthetically pleasing. But its porous nature makes it susceptible to water and oil stains. This is most likely the type of grout you have in your home, and you need to seal it properly for longer life.

    Why You Should use a Grout Sealer

    A grout sealer offers a lot of benefits. They include the following:

    Keeps the Surface Clean

    Sealing your grout will protect it from liquid stains and discoloration. It makes your surfaces and walls look clean and new. Without a grout sealer, you would have to spend a lot of time and money buying expensive bleach to clean grout regularly. Some of the stains could also discolor your surfaces permanently.

    Reduces Remodeling Costs

    Remodeling your house helps to raise the value of your property. But sprucing up the look of your house is an expensive affair, especially if you have to replace stained floors and discolored tiles in your bathroom or kitchen. Applying a grout sealer on susceptible surfaces could save you a lot in remodeling costs.

    It is a DIY Task

    Applying a sealer on grout is a straightforward process that you can handle on your own. The sealers come with detailed manuals with instructions on how to use them properly. If you can follow simple instructions, you can do it yourself. You don’t need to waste your money hiring a professional to handle a simple DIY task.

    Grout Cleaning is Tedious

    Cleaning grout is a tedious process you would rather avoid. With a good grout sealer, you can save yourself the trouble of having to clean it regularly.

    Keeps your Surfaces Shiny

    Apart from protecting your surfaces from stains and discoloration, a grout sealer spruces up their overall look. If your surfaces are looking dull and worn, applying the right grout sealer will leave them looking shiny instead.

    Protects Grout

    If you leave your grout unprotected, they could warp and fall off after soaking in water. Grout sealer forms a protective layer that is impervious to water over the surface, thus prolonging the lifespan of the grout.

    woman using Tuff Duck Grout Sealer

    What to Consider Before Buying a Grout Sealer

    All sealers are not equal. You should consider the following factors before buying a grout sealer.

    Solvent-Based vs. Water-Based Sealers

    Water-based sealers won’t penetrate beyond the surface level and have to be reapplied often since they don’t last as long. They are used in areas not exposed to too much water and are thus not suitable for use in your bathroom, showers, or tubs. These sealers also have low VOC levels, making them safe to use around young children and pets.

    Solvent-based sealers will penetrate deeper beyond the surface. However, they are made using toxic chemicals and have high VOC levels. If you have small children or pets, make sure the surfaces are dry before they start running around the house again. You may also need to crack open those windows to allow for proper ventilation during application. Unlike water-based sealers, these don’t require to be reapplied as often.

    Ease of Application

    Some grout sealers will come with bottles fixed with spray nozzles for easy application. Others come in large gallon containers, and you may need to use a roller-brush, paintbrush, artist brush, or sponge to apply. Makes sure you choose a grout sealer that is easy to apply.

    Colored or Colorless Sealer

    Colorless sealers are more common and are preferred because they don’t alter the natural look of your grout. But colored options can also be a good option if you want to spruce up the overall look. With a colored sealer, however, you may need to reapply often to maintain the color.

    Odorless Sealers

    Some grout sealers produce strong odors that take time to dissipate. Apart from being unpleasant such odors can cause respiratory problems. Although it is difficult to find a completely odorless option, many produce only a slight odor that dissipates quickly.

    Size of the Area

    The amount of grout sealer you use will depend on the size of the area you want to seal. Smaller bottles will be adequate for smaller areas. But you may need to buy the large gallon containers if you want to cover large areas. The porosity of the surface will also determine how much you need. For instance, natural stones will require more compared to ceramic tiles owing to their porous nature.

    Durability

    Some of the best grout sealers can last up to five years. Others are just a quick fix solution and will require reapplication more often to be effective. A durable sealer saves you the trouble of having to reseal your grouts regularly and saves you money in the long run.

    Nature of the Surface

    Not all sealers can be used for all materials. Some sealers can only be used on grout, while others will also seal other types of surfaces, including natural stones, graphite, marble, and ceramic tiles. Make sure to use the right sealer to avoid damaging the surface.

    Price

    Grout sealers are not costly, but they can also be expensive if you require large amounts to cover an extensive area. A high price doesn’t necessarily mean high-quality. So don’t just consider price when buying a sealer.

    Drying Time

    You should also consider how long it takes the grout sealer to dry. Some sealers will take up to 72 hours to dry completely. Such options may not be favorable when you have to use the space almost immediately.  Ensure you give your sealant enough time to dry to avoid damaging it, thus rendering all your hard work useless.

    Indoor vs. Outdoor application

    Some grout sealers can be used both indoors and outdoors, while others are only suited for indoor applications. The less durable options will not withstand the harsh conditions outside and are better suited for indoor use.

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    Conclusion

    There are many grout sealers on the market. But finding the right product for your needs is easier said than done. We hope our reviews of the best grout sealers in 2020 and the comprehensive guide on what to consider before buying have made the process of finding the perfect one for your needs less daunting.

    Ultimately, the sealer you use will depend on your needs and personal preferences, but if you want a durable grout sealer suitable for both indoor and outdoor applications, consider the Miracle Sealants 511GAL4 511 Impregnator Sealer. However, if you’re looking for an option that will not break the bank, the StoneTech Heavy Duty Grout Sealer will give you the best value for your money.

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