8 Best Granite Sealers (works for Marble, Quartz, and Others Too)

how granite sealer works
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Brand-new granite countertops can make almost any kitchen shine with its high-end beauty. But if that granite doesn’t have a good sealant, homeowners might not be able to enjoy its long-lasting benefits and aesthetic charm.

Fortunately, there are several effective granite sealers to choose from. Each has specific advantages and potential drawbacks, and understanding their differences is key to finding the best granite sealer for the money.

No matter what type of granite you’re looking to protect, there’s an option for you. Without further ado, let’s check out the most powerful and highly-rated granite sealers that can keep your granite (or other natural stone) countertops stain-free, clean, and absolutely gorgeous.

Our 8 Favorite Granite Sealers

ProductSizeCoverageCuring Time
best-granite-sealerMiracle Sealants 51132 ozup to 1,000 sq ft3-5 hours
granite-countertop-sealerTriNova Granite Sealer18 ozup to 100 sq ft1 hour
professional-granite-sealerAqua Mix Sealer's Choice Gold32 ozup to 375 sq ft2 hours
granite-protectorRock Doctor Granite Sealer18 ozup to 120 sq ft30 minutes
best-natural-stone-sealerSimpleCoat Sealer8 ozup to 3,000 sq ft1 minute
granite-sealer-reviewsGranite Gold Sealer24 ozup to 200 sq ft24 hours
quartz-countertop-sealerBlack Diamond Granite Sealer32 ozup to 300 sq ft8 hours
best-marble-sealantTuff Duck Stone Sealer22 ozup to 800 sq ft6 hours

Granite Sealer Reviews

#1 – Miracle Sealants 511 Impregnator Sealer

best-granite-sealerIn terms of longevity and effectiveness, it’s a challenge to find something better than this penetrating sealer. Let’s face it, applying sealer is not something you want to do every few months.

When properly applied (a quart covers up to 1,000 square feet), Miracle Sealants 511 can protect granite surfaces for up to 20 years. That said, the manufacturer recommends resealing every 2 to 4 years for the best resistance.

If the long-lasting nature of this option isn’t attractive enough, then you may want to consider it’s multipurpose, multi-surface uses. This sealer can be applied to natural stone, ceramic tile, quartz, and even grout.

If you don’t use the entire container while sealing your granite, then you can always seal other stone surfaces in your home such as in your bathroom or backyard.

It doesn’t matter if you’ve never sealed a surface before; Miracle Sealants’ product is fantastically easy to use and apply. You could use a variety of on-hand household objects to buff this sealer into a surface, making it an accessible choice. The 3-5 hour cure time is a bit longer than most but still very reasonable. 

These factors combine to make this one of the most potent and budget-friendly granite sealers, especially when you have a large surface that needs sealing.

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#2 – TriNova Granite Sealer and Protectant

granite-countertop-sealerTriNova’s Granite Sealer and Protector is made in the USA and is arguably one of the best granite countertop sealers thanks to its easy application (just spray it on) and added shine protection.

Like most others, it’s a penetrative sealer, so you can rest easy knowing that your seal will keep for quite a while after applying it.

Another unique feature of this sealer is its quick-drying and fast-setting design. Rather than having to wait a full day before using your granite surfaces, you could have them back in about one hour when you use this sealer.

You can use TriNova Granite Sealer on tons of stone surfaces, including soapstone, limestone, and slate. It’s made to not only protect but also to help bring out the best from your stones. This sealer can make colors more vibrant and add a little extra brightness to a counter’s shine.

While it may be the easiest to apply granite sealer out there, the bottle only covers about 100 square feet. This is fine if you have a single countertop to cover but it can get expensive for larger areas.

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#3 – Aqua Mix Sealer’s Choice Gold Penetrating Sealer

professional-granite-sealerThis Aqua Mix pourable granite sealer is ideal for large projects and multiple stone surfaces. If you’re looking to protect granite flooring or stone flooring, Aqua Mix might be well-suited to your project.

The 32 ounce container has enough sealant to cover about 375 square feet of natural stone surfaces including granite, limestone, slate, porcelain, saltillo, marble, masonry, and cement.

It can be a bit messier than spray-on alternatives, but if you’re planning on mopping your sealer into the floor, Aqua Mix Sealer’s Choice Gold offers the most convenient packaging and application. 

Despite its viscosity and thickness, this sealer can cure in as little as two hours. It’s also mold and mildew resistant, making it ideal for moisture-prone areas of the home.

You could use this product for your outdoor patio area or your indoor grout. Either way, you’re bound to experience the excellent protective effects of this professional granite sealer.

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#4 – Rock Doctor Granite and Stone Sealer

granite-protectorThis popular granite sealer comes in a handy spray can, making for an even coating that’s easy to apply.

To use this sealer, all you need to do is pop off the cap, shake the can, and spray onto your clean, dry granite. After waiting a couple minutes for it to penetrate below the surface, simply buff the surface with a clean cloth to remove any excess residue. 30 minutes later, your surface is ready to use.

Rock Doctor makes it an exceptionally quick and easy process, especially for those on tight schedules. However, this sealer must be reapplied to surfaces every 6-12 months, making it one of the shortest-lived sealers.

But if you’ve got one eye on your granite and another on your wallet, you can’t do much better than the Rock Doc. It’s one of the most affordable granite sealers on the market. Plus, you can even spray this onto your grout to keep it mold-free.

One 18 ounce can covers about 120 square feet of granite or other natural stone surface so it’s perfect for smaller jobs. Rock Doctor also sells their top-selling 3-Piece Combo Kit (includes this sealer as well as a cleaner and polish) at a great price, making it the best complete granite maintenance option around.

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#5 – SimpleCoat Natural Stone and Stainless Steel Sealer

best-natural-stone-sealerWhite this granite sealer might look like a pricey bottle of shampoo, it’s actually an extraordinarily safe, easy to apply sealer. If you’ve been searching for a non-toxic granite sealer for your kitchen, patio, or bathroom, SimpleCoat might be exactly what you’ve been looking for.

To make matters even better, this sealer wipes on and immediately sets in. You don’t have to wait for it to dry, making it ideal for individuals with hectic schedules or young children.

This granite sealer is a little pricier than other options, but the price reflects its superior quality and safety.

A single bottle of this sealer can protect up to 3,000(!) square feet of natural stone surfaces (even more for stainless steel). Because it goes such a long way, is safe for pets and families, and requires literally zero curing time, this product more than pays for itself.

Finally, we like that 99% of this product (including packaging) is sourced from US manufacturers.

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#6 – Granite Gold Sealer

granite-sealer-reviewsGranite Gold Inc. is proudly made in the USA and is a family owned company that spans three generations. Their best-selling sealer is an excellent value alternative to more expensive granite sealer options.

And though it’s easy on your wallet, it’s not a weak or low-quality sealer. However, because this granite sealer comes in a relatively small container, it is best for smaller projects (up to 200 square feet).

Still, Granite Gold not only protects natural stone against water and oil but also etching. This means that this sealer provides a thick wall of protection that may be able to help surfaces resist scratches and dents.

And while this option does require the longest cure time on our list (a full day), if you have the patience, it’s a fantastic non-toxic, non-corrosive sealer.

It’s also worth noting that another product from this company, Granite Gold Daily Cleaner, is probably the best granite cleaner available on the market today and pairs perfectly with their sealer.

It’s nearly impossible to find a higher-quality granite sealer that comes in such a conveniently compact and easy-to-use package. To use this sealer, simply spray, wipe, and walk away. How could granite sealing get any easier?

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#7 – Black Diamond Stoneworks Granite Sealer

quartz-countertop-sealerNo matter how large or small your sealer needs might be, Black Diamond has a granite sealer that’s perfectly sized for you. Available in sizes from one pint to one gallon, this food-safe sealer is non-toxic and non-acidic, ensuring that it won’t corrode or damage your beautiful stone or granite.

Black Diamond sealer can be used on concrete, grout, stone, and granite. It can even help brickwork stay strong and protected. The popular 1-quart size bottle will cover up to 300 square feet of your porous surface and protect it from stains.

This option might work best in kitchens, especially since it’s able to repel liquids and oils with ease. It’s also a water-based sealer with minimal fumes and odors, helping to keep your home liveable and pleasant even during application.

Just as you’d expect from such a hard-working granite sealer, this choice provides a penetrating barrier that can last for years. It’s also incredibly easy to apply to counters, especially thanks to the spray nozzle. However, this sealer does take up to eight hours to cure, which can be frustrating for some.

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#8 – Rocklinite Labs “Tuff Duck” Natural Stone Sealer

best-marble-sealantIt can be a significant challenge to find a small amount of granite sealer, and this can make small projects tricky. This notion is especially true for anyone hoping to reduce their waste and use all of the sealer that they purchase.

Fortunately, this granite sealer comes in a small, 22-ounce spray bottle that’s ideal for small projects. While it can cover up to 800 square feet of surface, this is highly dependent on the porous nature of the material.

While a granite surface can approach that coverage number, a highly porous surface like sandstone will absorb a lot more sealant and you’ll get only a fraction of that number.

Tuff Duck natural stone sealer could potentially last for up to ten years, though it’s more likely to last three to five years. Still, that’s a reasonable amount of protection. This product can be used on multiple surfaces, but it may be better to limit usage to granite and grout.

This sealer should be applied to light-colored surfaces, as it could leave a whitish residue on darker stones and granite.

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Granite Sealer FAQs

Now that you’ve browsed some of the best granite sealers on the market today, it’s time to take a moment and consider what you’re looking for when you shop for a granite protector.

For example, if you’re hoping to seal a small outdoor section of granite, you’ll likely need a small amount of heavy-duty granite sealer.

However, if you’re hoping to seal a number of large granite countertops, a small bottle likely won’t cover all of your surfaces. Additionally, an outdoor-friendly product may be toxic in interior environments. 

Understanding how granite sealers work and why they’re necessary is crucial to choosing the right one for your project. Let’s dive in and answer some of the most frequently asked questions concerning granite sealers.

How Does Granite Sealer Work?

how granite sealer works

There are two primary ways that granite sealers work, and the type of sealer determines the exact sealing process. Impregnating or penetrating sealers (whether a granite or concrete sealer) seep deeply into the stone, providing a deep and long-lasting barrier. Film or coating sealers simply attach to the surface of the granite to keep liquids away.

Penetrating sealers are typically more popular than coating ones. Not only do they last far longer, but they also prevent stains and corrosion more effectively. Still, your preferences, budget, and needs will help you decide which type is right for you.

See Also: How Penetrating Concrete Sealers Work

Is Granite Sealer Necessary?

The answer to this question depends on the type of granite in question. Though all granite is igneous rock, not all granite is equally porous. Additionally, the unique color of a piece of granite can help determine whether a sealer is necessary.

The lighter the granite, the more likely it is that it needs to be sealed. White, grey, and lighter-colored stones tend to show stains more vibrantly than darker varieties. But if you’re working with very dark pieces of granite, you may not need to seal it.

Still, a granite sealer can be a beneficial addition to any granite kitchen countertop, no matter the color. That’s because sealers repel substances that might otherwise cause granite to decay and crumble.

As such, granite sealers aren’t always required, but they’re almost always recommended. 

How Long Does Granite Sealer Last?

Unfortunately, a granite sealer isn’t entirely permanent. It must be reapplied about every three to five years to ensure that the stone beneath remains protected. Still, there are some granite sealers that are capable of lasting much longer (and some much shorter).

The pre-existing condition of the granite, the strength of the sealer, and quality of the application will likely factor into how long a sealer lasts. Be sure to check your preferred sealer for manufacturer recommendations concerning reapplication.

Proper application is a must for durability. Just like using a good concrete cleaner before applying a sealer, you need to have a clean, dry surface when applying a granite sealer.

How Do You Know When Granite Needs Resealing?

using granite sealer

It can be a challenge to know exactly when to re-seal your granite. In general, you have two options to choose from: 

  1. You could choose to write a note for yourself and attempt to hold onto it for three to ten years, or 
  2. You could keep an eye on your granite and note any changes in the color, shine, or shape

If you notice that the surface of your granite object is beginning to dull or become discolored, it is probably overdue for a re-sealing. However, you could re-seal before any damage occurs by occasionally testing your granite’s waterproofness.

Squeeze a very small amount of lemon juice (a few droplets should be enough), onto the surface of your granite. If the surface begins to darken, immediately blot the juice up until the granite is dry. Then, apply your sealer.

If granite changes color when it comes into contact with liquids, especially acidic or oily ones, then it’s likely too porous to survive outdoors, in the kitchen, or in the bathroom. In these cases, a sealer is necessary to extend the life of the stone.

Does a Sealer Make Granite Shine?

No, sealers do not make granite shine. However, high-quality granite sealers can help granite stay shiny for longer. Sealers seep into the rock through tiny, porous channels and holes. It then hardens, repelling water and helping to keep the stone safe from moisture damage.

However, only polishes and polishing devices can help granite achieve a mirror-like shine. Once that shine is gone, you may need to hire a professional polisher to bring it back. Of course, you could also apply a little oil to the granite after sealing it.

Though the majority of the oil will not seep into the granite, daily oil buffing can result in a pleasantly smooth and shiny granite surface over time.

Does Granite Sealer Work on Other Surfaces?

Granite sealers can often work on other surfaces including: marble, travertine, quartz, stucco, slate, terrazzo, agglomerate, porcelain tile, ceramic tile, glazed tile, and concrete. However, granite sealer should never be applied to wood, plastic, or cloth surfaces. 

If you’re looking to seal multiple surfaces with a single product, you’ll want to ensure that your preferred sealer is approved to work on marble, grout, and granite. This can help you avoid making a regrettable purchasing decision.

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