Best Slate Sealers 2022 – Reviews

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slate Using a slate for tile, countertops, floors, and patios will always be one of the best choices for a homeowner. However, the strength of a slate tiling may be tested by frequent contact with water, which may lead to erosion over time. To prevent this, you need to seal your slate with one of the best slate sealers on the market

Best Slate Sealers in September, 2022

Tuff Duck

Editor's Choice
up to 200 sq ft Check Price
2Miracle Sealants500 - 1000 sq ft Check Price
3Granite Goldup to 75 sq ft per aps. Check Price
4Aqua Mix225 sq ft Check Price
5Tenax160 - 180 sq ft Check Price

1. Tuff Duck Granite Alongside Grout And Marble Sealer – Very Durable

This is no doubt one of the best slate sealers you will get in the market. Since it was launched, Tuff Duck granite, grout, and marble sealer provided high protection for surfaces made of granite, marble, slate, grout, travertine, limestone, and concrete. This is due to its ability to prevent the penetration of water while keeping the natural appearance of the stone tile.

What Makes Tuff Duck Sealer Different

There are several stone sealers in the market, many of which also work for slate surfaces, but Tuff Duck sealer sets itself apart in some ways, some of which are:

Easy To Use

Since it came into the market in 2015, Tuff Duck stone sealer has been the preferred choice of many homeowners with stone countertops, flooring, or just on any other surfaces around their homes. This is because of the ease with which the product can be applied. You do not need the help of anyone to seal your floor, as all you have to do is coat the surface with a good deal of the product and wait a couple of hours for it to fully seep in. Afterwards, you clean up and enjoy a stress-free use of your slate surfaces.

Very Durable

The main reason most people go for stone countertops and floors is due to their longevity. However, the tendency to become porous over time poses a problem to which a sealer is a way to go. For this reason, it is important that a slate sealer be durable and be able to withstand frequent contact with water over time. This is what Tuff Duck sealer provides in excellent fashion. Long use of slate surfaces without erosion or degradation.

  • Provides up to 5 years protection on interior surfaces and 3 years on exterior surfaces
  • Works with a wide array of stone surfaces
  • A quart protects up to 200 square feet of coverage
  • Highly rated by previous customers
  • May need two coatings for best result

2. Miracle Sealants 511 Impregnator Sealers – Weather-resistant

Miracle sealant is one of the most popular products among homeowners with stone surfaces. This product works on various surfaces, both interior, and exterior, including grout, slate, marble, granite, terrazzo, travertine, stucco, and tiles of different textures. Notable for its ability to protect stone surfaces against water and oil stains and spillages, one quart of Miracle Sealant will cover up to 1,000 square feet of the surface.

Why Is Miracle Sealant An Excellent Choice?

With a 4.5 stars rating, previous customers of Miracle Sealant mostly have good things to say about the product through reviews left on various platforms. Here are some of the reasons this product is an excellent choice for anyone looking for slate sealers.

Offers Good Quality For Value

Miracle Sealant is one of the products in the market where customers get the best for their money when it comes to getting value for money. The product is relatively cheap in comparison to other sealants of its quality and continues to retain its high quality over time.

Easy To Use

Most people who use stone surfaces apply the sealants by themselves. This is why it is important for sealants to be easy to use for DIY homeowners. Miracle Sealant ticks this box as all it takes is to clean the surface, apply the sealant, wait for it to dry, then clean.

Useful In Diverse Settings

Sealants are used for both interior and exterior surfaces, and while some sealers have the stronger capability in only one of the two settings, Miracle Sealant does well in both. The same quart of Miracle Sealant can be used to coat countertops as well as a bathroom tile, and optimal results will be gotten in both places.

  • Resistant to the weather
  • Easy to apply
  • Invisible
  • Cheap compared to most products of its caliber
  • Cleaning up after application can be a difficult task

3. Granite Gold Sealer Spray Water-Based Sealant – Non-Toxic

Granite Gold Sealer Spray is different from many other products of its type because it is not just a sealant for any surface. This product is designed to protect countertops from liquid spillages and stains as well as soil build-up, but it also works for floors. It is useful on a wide array of stone surfaces such as slate, marble, granite, travertine, grout, limestone, among many others.

Why Choose Granite Gold Sealer Spray?

The answer to this question is easy. This product is one of the best sealants on the market and serves more purposes than an ordinary sealant or polish. Below are some of the reasons you should choose Granite Gold Sealer Spray, as thousands of people have done before.

Safe To Use

For a product focused on countertops, Granite Gold Sealer Spray manufacturers definitely deserve a brownie point for ensuring that the product is non-toxic. The product is safe to use by anyone on any compatible surface without worrying about getting in contact with it or suffering from any side-effect from its use. It is non-toxic, non-acidic, and has no phosphates or ammonia.

Easy To Apply

Unlike many other sealants, you do not have to leave Granite Gold Sealer Spray on for several hours after application. All you have to do is apply 2 or 3 times with 20 minutes gaps between each application.

Has Very Good Ratings

Granite Gold Sealer Spray has been in existence for a while, and customer feedbacks have always been positive. The product is rated 4.5 out of 5 in durability, 4.3 in ease of use, 4.0 in scent, 3.9 in value for money, 3.9 in sheerness, and 3.8 in thickness. Reviews with picture evidence are available on different platforms to solidify the reputation of this product.

  • Non-toxic, therefore easy to use on surfaces handling food
  • The product is easy to use as the packaging is also designed as an applicator.
  • It is very durable and only requires two applications in a year.
  • May not be compatible with other products

4. Aqua Mix Sealer’s Choice Gold Quart – Good Choice

Aqua Mix Sealer is out of the league of other stone sealers and has a reputation to back it up. The product is a water-based sealer that gives a natural no-sheen look to your stone surfaces such as granite, marble, slate, limestone, travertine, Saltillo, porcelain, concrete, and many others. It provides stain and spillage protection as well as vapor transmission. It is a highly-effective sealer for slates.

What Makes Aqua Mix Sealer A Great Choice?

For all the years it has been in existence, Aqua Mix Sealer has hardly ever failed any customer. This is due to the product’s superior quality, which is attested to by the reviews left by customers on various platforms. There are more reasons this product is regarded as a great choice, and here are some of them:

Very Resistant Against Water

Aqua Mix Sealer is preferred by many professionals and individual homeowners due to its ability to repel water, oil, and other liquid spillages. It also protects against stains and is easy to clean.

Good Value For Money

Everyone wants to get the best value for their money, and when it comes to slate sealers, Aqua Mix is one of the best products to go for. 32 Ounce of this product provides coverage for over 1000 square foot of surface, almost two times the capacity of many similar products.

Great Ratings And Review

Aqua Mix Sealer has one of the best reviews in the market, clinching a strong 4.6 stars out of 5. This product is regarded as a world-wide best-seller in sealers as it ticks all the boxes for a great sealer and more.

  • Provides very strong protection against water and other liquids.
  • Compatible with different types of surfaces
  • It can last up to 15 years
  • It May take some time to fully dry

5. Tenax Granite Sealer – Highly-rated

Tenax Granite Sealer is a mineral-based sealer that works for all types of stone surfaces. It is a highly-revered product in the market and is one of the best products for slate sealing. It protects different types of stone surfaces against water and oil stains while being invisible.

Why Tenax Granite Sealer Edges Out Other Sealants

There are many sealants in the market, but Tenax Granite Sealer is one the best for all surfaces. Below are some of the reasons people have been rating Tenax Granite Sealer high over the years.

Will Not Change The Colour Of The Stone

If you worry about a sealant changing your stone, this is the product to go for. Tenax Granite Sealer does not alter the color, texture, or surface of the stone. This is the reason most people with expensive stone surfaces go for this product and keep on using it over the years.

Dries Very Fast

Most people complain about having to wait long periods of time for their sealants to dry. This may delay the application of more coats and, consequently, the use of the surface. Users of Tenax Hydrex Sealant do not experience this hardship as the product takes just between 5 to 10 minutes to dry.

Very Effective

Tenax Hydrex Impregnator and Sealer does every work effectively and efficiently in every ramification. It prevents water and oil from making damages to a surface and requires little touch-up over the years.

Compatible For Indoor And Outdoor Use

This product is compatible with use on stone surfaces inside and outside the house. It also achieves maximum results in both instances and does not break down over the years. So, for your indoor surfaces such as countertops, bathroom tiles, the product works fine. It also does the same for outdoor surfaces such as roofs, patios, and so on.

  • The product is very easy to apply
  • Very effective
  • The product is invisible after it is applied
  • Dries within a very short period of time
  • It doesn’t build up over the years
  • The smell can be too strong when being applied
  • It is flammable

What Slate Sealer Actually Does

Slate sealer protects slate or tile from stains caused by coffee, wine, tobacco, and other common household products. It can also be used on faux stone that is not made of actual stone. When applied correctly and maintained regularly, the product can last several years before it will need to be reapplied.

Slate sealer protects your rock from staining and seals holes that the grout can not reach. This helps keep a more finished look after cleaning as well as keeping the rock looking good longer. In addition, slate sealer acts as a barrier for gases produced by natural stone. It keeps those gasses staying at the surface of your stone rather than permeating down into the pores of your slate or tile.

How to Apply Slate Sealer

slate-textureYou can apply it by using a brush or roller. Make sure that your slate is cleaned properly and all dust or debris are removed with a vacuum cleaner. Next, remove the sticker on the bottle by using a razor blade and then pour some of the sealers into a clean container from which you will be applying it onto your stone.

Apply a small coat to one section at a time applying it evenly over the surface using a brush or roller. Allow it to dry for 24 hours before using. Always follow the manufacturer’s instructions carefully as each brand has its own ways of application and drying times needed before usage.

Frequently Asked Questions

How often should you seal a slate floor?

  1. Whenever the surface looks worn or damaged.
  2. After 3 years of service (or after the next transition season).
  3. Once a year, before winter sets in and cold weather causes excessive wear on seals.
  4. Whenever there is a spill to be cleaned up – including water and other liquids such as tea, wine or coffee.

Should I seal slate tile before laying?

The final decision regarding whether or not to seal slate tile before laying depends on your personal preference. Many people feel that sealing the tiles will protect them from staining and make it easier to clean their surfaces, though some argue that this will prevent stains (and grease in particular) from absorbing into the surface properly. So it’s preferable to seal slate tile before laying because it might keep the surface clean and shiny for a long time.

How do you clean slate tile before sealing?

To ensure that your slate cleaning efforts are successful, clean the slate tile and grout with a solution of water and bleach (1:4 or 1:5) using a scrub brush. Continue scrubbing for 10 minutes. Rinse Slate Tile thoroughly and dry completely before applying sealant. The slate also needs to be completely dry before sealing. Soaking it overnight will help ensure that (though it may still feel damp).

How long should slate dry before sealing?

It’s best to let slate dry for at least 24 hours before sealing. The sealer needs enough time to soak into the surface of the slate. Since sealer is a clear coat, it will seal the natural color of Slate and any variations in that color, including traces of tannin (extra-dark spots on the slate). While you’re waiting for the sealer to dry, use it as normal – just remember not to place hot or wet food directly onto your countertops.

Will the sealer change my slate’s color?

No. The sealer is clear, and it will not alter your slate’s natural color. When you seal the countertops, what you’ll see is a slight transformation of the natural spot variations into a more uniform darker shade – that’s it! This gives slate a more structured look, but if you prefer its original texture and color appearance, just wait for at least 24 hours after sealing before using Slate normally (just remember not to place hot or wet food directly onto your countertops).

Should the outdoor slate be sealed?

Yes, an outdoor slate should be sealed in order to protect it from the elements. Actually, it needs sealing more than an indoor slate. Outdoor weather and conditions are harmful and harsh to all stones including slate. Sealing an outdoor slate will help to keep it looking new for many years. Weathering of natural stone, such as the discoloration and staining that naturally occur over time, is a normal process. However, if left untreated these surface changes can leave a dirty appearance on outdoor slate.

Does slate sealer add a wet look?

Some slate sealers can add a wet look to your stone tile. But you should check the chemical formula of that slate sealer first before using it on your stone tiles.

Does sealer protect slate from scratches?

No, the sealer only protects the surface from stains and grime. The top layer of slate is very soft, which means it can be damaged by hard objects no matter how much sealer there is on the surface.


Sealing a slate is the go-to option to protect your countertops or tile against water damage and to give it a more aesthetic look. Apart from keeping your slate protected against frost frequent spills of water from cleaning, sealing a slate also gives it a shine that is favored by many. It is not every slate that needs to be sealed, but if yours needs to, do so fast before the weather eats away your expensive slate. Above are some of the best slate sealers in the market to help you keep your slate strong through the years.

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