Limestone is a popular choice for building structures, floor tiles, pavers, or retaining walls. And it’s also used in home interiors, especially on different countertops. You mostly like it for its natural look and soft-to-touch texture.
But! This highly porous material can deteriorate rapidly with frequent use if not sealed properly! And you could lose that “very special” appearance.
Yes, we’re talking about sealing your limestone to resist the damaging factors and maintain its appealing natural look. But what’s the best limestone sealer out there?
Well, there are hundreds, and you could easily end up with the wrong one that’ll provide an unwanted glassy or slippery texture!
Relax! Our team of limestone lovers has done enough research to come out with the best options that would ensure a durable and desirable final appearance for your limestone.
We’ll not only review these best sealers but also take a dig at everything you need to know while choosing one!
Why Does Limestone Need to Be Sealed?
Are you wondering why we should seal the limestone? There are quite some benefits, and not doing it would be rather silly!
Let’s take a look at some of the key ones here.
Limestone is a highly porous material and will absorb moisture if it remains unsealed. So sealing the limestone will prevent moisture, hence the quick deterioration.
Resisting the oil and water-based stains is one of the major reasons you’ll seal the limestone.
Most sealers are water repellent which makes them impregnable to staining. So you can be relaxed about those spills which could cause damage.
Provides Ease of Cleaning
Sealer fights all of your limestone’s difficult-to-defeat enemies. And you’re left with simple cleaning and maintenance activities that you’d have undertaken with anything else.
Prevents Fading & Maintains the Original Natural Appearance
Limestones prevent fading and help maintain the natural look.
A sealer doesn’t play with the originality of the appearance. Rather it provides a highlighting visual to make the surface look brand new with every coat. And you could see the magic even though you use it as a black limestone sealer.
Save Replacement Cost
Being porous and prone to moisture or stains, the limestone could deteriorate rapidly costing you replacement charges.
By using sealer and maintaining it properly, you could prolong the longevity of your limestone and very much save a premature replacement cost!
Our 10 Best Limestone Sealer Reviews
Which is the best sealer for limestone? You’ll soon be able to answer this, once you check out all our top recommendations below. Let’s start!
1. Miracle Sealants 511QT6 511 Impregnator Sealer
The impregnator-style sealer doesn’t affect the natural appearance of your limestone. And yet it provides amazing protection from stains.
If you’re too serious about keeping the appearance as it is, check out this impregnator from Miracle Sealants.
Not only us, but you’d also find your contractor suggesting this as the Cadillac of Sealants!
And that’s because this highly penetrating sealer could get through well to protect densely porous limestone surfaces.
The natural look stays the same as it’s not a surface coating and only provides an invisible barrier to resist stains and moisture. However, it’s breathable and lets vapors escape easily.
It comes with great coverage, but again it depends on the type of your material and application. We recommend recoating every couple of years for the best results.
Applying this sealer is fairly easy. However, you should be wearing eye and hand protection to avoid any potential danger!
- Impregnator-style sealer
- Water-based Penetrating Formula
- Coverage up to 1,000 sq. ft. per quart
- Compatible with medium to dense porous surfaces, including limestone
- Used in both interior and exterior applications
2. STONETECH BulletProof Sealer
When you’ve got a penetrating and breathable stone sealer, you can expect it to go well with porous natural stones such as limestones.
The BulletProof Sealer from Stonetech is one such option to protect your limestone construction from oil and water-based stains.
If you’ve used limestone on the countertop or floor, you should definitely try this out. You’ll see water beading up for quite some years while keeping it shiny and stainless like new.
It comes in a safe, water-based formula with a minimal odor to go with. The weather resistance and non-flammability features make it a top choice for exterior applications as well.
The company and we both recommend you to seal once every year even though it could be a little expensive. So if you have some leftovers, don’t throw them away but keep them for the next use. And enjoy the beautiful original look with a slight gloss.
It’s easy to apply but make sure to follow the instructions and prep everything right. If the application doesn’t go smoothly, you’ll probably have yourself only to blame!
- Compatible with porous natural stones such as limestone, grout, and so on
- Works well for interior applications
- Coverage up to 100 sq. ft.
- Water-based Fluoropolymers formula
- Breathable and penetrating
- Professional grade quality
3. Stone Care International Granite Sealer and Protector
If you’re considering an easy-to-use sealer for your limestone countertop or floor, this is a top option to consider. You spray, you wipe, and you get the surface sealed. Yes, it’s really easy peasy!
Breathability is an important factor for any sealer. And you get that perfectly in this Stone Care Sealer. It’s well-formulated to release moisture vapors while protecting the surface from stains and water.
It’s not super expensive but does premium sealing for limestone countertops. If your wife is obsessed with having a brand new-looking countertop, this sealer could well be the option for you.
This sealer is steak-free and doesn’t leave any residue. It’s made of eco-friendly, food-safe chemicals, and you could use it in the food prep areas without any hesitation.
Its squeeze bottle provides excellent ease of application, and the coverage is pretty decent as well. Make sure to follow the directions while using because an improper application could result in poor results.
- Compatible with all solid stones, including limestone
- Ammonia and Phosphate free
- Food safe
- Streak-free formula with spray bottle application
- Penetrating sealer
4. Siloxa-Tek 8500 Penetrating Concrete Sealer
Are you thinking of some great silane/siloxane sealers? We’ve something for you. This water-based sealer from GhostShield works best for your limestone to prevent water and moisture invasion.
And yeah, it penetrates deep to provide waterproofing. What you get is a durable hydrophobic limestone surface that can bead water for quite a few years. Moreover, it’s breathable and allows moisture to escape.
Besides moisture, you must’ve heard about chloride and deicing salt as enemies to your all-special limestone construction. This sealer fights against them and resists their organic growth.
The sealer provides resistance to abrasion, freeze-thaw, and thermal cycling damage. There’s less dusting which makes it easy to maintain.
It’s UV stable, and it doesn’t impact your surface appearance. So you get a natural and original sleek finish. The sealer provides excellent coverage, and you can use both a roller and a sprayer to apply it.
It’s a thin sealer, and you’ll mostly require a second coat to achieve the desired finish. All in all, Siloxa-Tek is a great sealer to consider for your limestone.
- Industrial-grade, water-based Silane/Siloxane formula
- Penetrating sealer
- Provides water beading effect
- Compatible with a wide range of materials such as limestone, concrete, and so on
- Can be applied with a sprayer, roller, or brush
- Coverage up to 250 sq. ft. per gallon per coat
5. SimpleCoat Natural Stone and Stainless Steel Sealer
We’ve talked about some non-glossy natural stone sealers. But we know some of you don’t mind a hydrophobic, glossy seal on your limestone construction.
This natural stone sealer from SimpleCoat is one such sealer that requires your consideration.
It should make the best choice if you’re planning to use it on some decorative limestone countertops. The food safety certificates should boost your confidence to use them in the food prep areas.
And it’s actually free of any hazardous chemicals, solvents, BPAs, and so on. This SimpleCoat sealer comes in easy to apply wipe-on formula. With no to minimum drying and curing time, the sealer makes the top choice for those who’re in a hurry!
It comes in a highly concentrated formula yet a great coverage. It enhances the natural look of your limestone. However, some surfaces could be prone to color change, especially darkened stones.
The sealer says to be glossy, so don’t be surprised by the slight glossiness. You can easily and quickly apply this sealer, and you don’t need anything more than the instruction.
This is your go-to if you’re okay with a little glossiness and looking for a sealer to use in the decorative element. Otherwise, we’ve more options for you to follow.
- Creates Hydrophobic Glossy Seal
- NSF Tested and Certified
- Compatible with a wide range of materials, including limestone, metal, marble, etc
- Ultra-concentrated formula
- Wipe-on application without requiring any drying or curing time
- Coverage up to 3,000 sq. ft. of stone with one 8oz bottle
6. Black Diamond Stoneworks Store Color Enhancer Sealer
Are you looking to enhance the color of your limestone paver? If yes, then how about checking out a sealer that already names itself Color Enhancer. Yeah, we’re talking about the natural stone sealer by Black Diamond Stoneworks.
You want your limestone construction to look natural while also highlighting the features. This color enhancer takes care of this issue by rejuvenating the appearance of your unsealed surface.
The sealer provides excellent durability, and you can use it as both an interior and exterior limestone sealer. It provides excellent sealing to water while also allowing moisture vapor to escape. Yes, it’s breathable!
It enhances the natural appearance alright but doesn’t overindulge the gloss or shine. You can put some life into the dull-looking limestone floors or pavers with this sealer. And most importantly, keep them in pristine condition.
The application is fairly easy, and you can use a roller, sprayer, or paintbrush to get started. A couple of coats, and you should be good to see a huge change in your favorite limestone surface.
- Penetrating sealer
- Compatible with natural stones and pavers, including limestone, marble, travertine, concrete, and so on
- Works well in both interior and exterior application
- Applied using roller, sprayer, or paintbrush
- Seals out water while still allowing transmission of moisture vapor
Related: List of awesome sealers for your diamond art.
7. Miracle Sealants PLUS QT 511 Porous Plus Sealer
Now let’s talk about the Porous Plus Sealer for a highly porous material like limestone. Miracle Sealants brings you their flagship stone sealer as a must consideration.
If you want to protect your surface against stains, moisture, slippage, saltwater, you should seriously consider this one. It’s a water-based sealer that includes oil and water-resistant formulas.
This is a penetrating sealer design for most porous surfaces. It’s breathable and allows vapor release. But yeah, it doesn’t alter the natural appearance of your limestone surface at all. In fact, they become more highlighting and less slippery.
It also does well to resist different weather elements. The protection against UV transparent stain is quite evident. So it won’t turn yellowish any sooner.
This sealer is made of safe ingredients and can be used in food prep areas. The application is easy like other Miracle sealers, and the coverage is decent as well.
- Water-based sealer
- Applicable for both interior and exterior porous surfaces like limestone, concrete, travertine, etc.
- Covers up to 1,000 sq. ft. per quart
- Safe around food preparation areas
- UV transparent and weather-resistant
8. Serveon Sealants H2Seal H2100 All Purpose Stone Sealer
When talking about limestone sealers, there’s one option that we can’t really miss out on — the H2Seal from Serveon. Once you apply it to your structure you can really feel its impervious barrier from damaging saltwater and moisture.
You also see the least stains and efflorescence with this sealer on your limestone paver, sideways, or any other establishment. It’s highly effective, allowing you to relish more of your decorative exterior landscapes.
H2Seal’s stone sealer uses an advanced technology (Siliconate Water Repellent) that allows it to penetrate deep and form a water-repelling matrix on the limestone surface. In short, you get long-lasting, optimum protection for your investment.
You can use it as a limestone patio sealer or other outdoor structures such as pavers, driveways, and so on. It’s also used in indoor applications and could be used as a limestone tile sealer or countertop sealer.
This is a durable sealer, and you shouldn’t require recoating any sooner. Besides that, it has supreme coverage, which makes it quite cost-effective as well.
It’s quite easy to apply, and you should follow the instructions carefully to avoid too much work during the application.
- Silicones based professional grade stone sealant
- Can be used in both indoor and outdoor applications
- Compatible with stones including limestone, concrete, tile, and so on
- Penetrating sealer with Advanced Siliconates and Water-repellent Technology
- Max coverage up to 450 sq. ft per gallon
9. MasonryDefender All Purpose Limestone & Granite Siloxane Sealer
An All-purpose stone sealer could be an easy pick for limestone structures. This one from MasonryDefender probably has every feature you’d look for.
It’s water-based, clear, and penetrating. What else could you want for porous surfaces like limestone? The silane/siloxane formula makes it a top water-repellent sealant to provide water repellency for years.
It’s non-film forming and doesn’t alter the original color or appearance of the limestone surface. If you’re using it on the outside, you can’t even tell it’s there unless there’s rain to expose it.
This sealer also provides invisible protection against deicing salt. It doesn’t miss out on the breathability factor as well. So there’ll be no trapped moisture to ruin the substrate.
It provides great protection on most masonry and concrete surfaces, including limestone. You can expect little to no gloss on the substrate. However, there could be slight darkening on the dense surfaces.
So it’s better to test before using it on your surface. It’s easy to apply and available in different sizes. There’s a very low odor and has no strong fumes. All in all, this limestone sealer is a worth considering option.
- Water-based silane/siloxane sealer with low odor
- Works well in exterior applications that include porous masonry or concrete surfaces like limestone, sandstone, concrete, etc.
- Provides clear, non-glossy coating
- Protects from de-icing salt
- 100% breathable and water-repellent formula
10. Stella Sealants Ultra Dry 70
Let’s have a tested and proven sealer to end the list with. The Ultra-Dry 70 makes its mark as a sealer for a wide range of limestone applications. It helps your structure preserve the natural beauty by keeping the color of the stone through.
Small to large, residential to commercial, and interior to the exterior, you can use this amazing sealer for any of your applications. This water-based sealer penetrates well into the material and provides a barrier to prevent further degradation.
The water protection includes protection from saltwater as well. You also get maximum stain protection for your high-traffic limestone structures. It’s breathable, so there’ll be no moisture trapped in the material.
Sealing the limestone against water will also resist the organic growth of fungi and molds. So you can protect your investment from biochemical damage and ensure a more sanitary environment.
If you’ve got a countertop made of limestone, this sealer can rejuvenate it every time you coat. It’s made of food-safe chemicals as well. You can also consider it as the outdoor limestone sealer for the patios, pavers, and driveways.
Last of all, it’s quick and fairly easy to apply. The coverage is good, and you can make the most of it by following the instructions properly.
- Water-based natural stone sealer
- Used for both indoor and outdoor applications
- Compatible with materials like limestone, marble, concrete, and so on
- Easy to apply
- Safe for food prep areas
- Provides coverage up to 3,000 sq. ft per gallon
What to Look for Before Buying The Best Sealer For Limestone?
Since there are so many sealers available out there, it’s quite challenging to choose the best one for your limestone structure.
Luckily, there are some factors that could help you with the selection. In this section, we’ll check out all these factors in detail.
While there are topical or film-forming sealers, you need to choose the penetrating sealer that impregnates into the limestone substrate. These sealers soak into micro pinholes to rejuvenate their natural texture.
The penetrating sealer uses a macro-molecular formula that chemically reacts with the material and creates a stronger bond.
As a result, you get the maximum protection against oil and water-based stains. The impregnating sealer also makes the surface easy to clean and maintain.
The trapped moisture can damage your limestone surface. So it’s important to consider breathability in your limestone sealer. This feature allows your stone to breathe so that the retained moisture can pass through.
A fully breathable sealer forms a crystalline barrier inside the pores for enhancing the density and strength of the material.
The densification process will also reduce the movement of water and moisture. As a result, you’ll get a long-lasting natural appearance.
Clear & Transparent Formula
Since you don’t want anyone to detect the existence of sealer in the limestone, it’s obvious to choose an option that’s clear in texture.
The water-based sealers are the best option for that. They create an invisible silane-siloxane chemical bond with the material pores to keep it undetectable.
Its transparent chemical penetration also allows the substrate to keep the natural texture.
This feature is the most significant one if you don’t want your sealer to leave a visual impact on the limestone structure.
Eco-friendly & Food Safe
Talking about safe chemicals in your limestone sealer, you must check out whether it’s made of low or zero VOC. A low VOC sealer is safe for your stone texture as well as your health.
The water-based sealers don’t generally include harmful chemicals and are mostly food-safe as well. So check out the ingredients before you buy and make sure that it’s safe to use in food prep areas like kitchen countertops.
Natural stones like limestone need resealing over time. But the gap between two coats shouldn’t be anything less than 2 years ideally. So make sure to have a durable sealer that has an average lifespan of more than 2 years.
Ease of Use
Before buying your limestone sealer, make sure to understand its application process. The roller, spray-on, and paint-brush are popular application options and provide ease of use depending upon the nature of the surface and application.
You should also consider the drying and curing time. Because you’d generally need two coats for your limestones so the interval between two gaps shouldn’t frustrate you.
This factor comes into play when you’re looking to get a limestone sealer for exterior applications. The sealer that’s UV resistant holds well in sunlight and prevents your surface from deteriorating or turning yellowish.
While the UV rays will still hurt the longevity of the sealer, a UV-resistant sealer will last longer than the regular ones.
You wouldn’t want your sealer to smell bad and bother people around the application surface. So you’ve to choose one with a low odor and nice scent. Luckily, there are some great low odor limestone sealers available out there.
How Do You Clean Limestone Before Sealing?
Sealing your limestone needs some preps. Sealing in newly installed limestone is preferred even before applying grout on it. But for a successful cleaning mission, you need to clean your limestone thoroughly first.
Here are some of the steps to follow:
- Check out if there’s already a coating on the surface. If there’s a coating found, make sure to strip it off first.
- Once there’s no additional coating, mop your limestone surface thoroughly with a PH-neutral cleaning product. For a particularly dirty surface, an Alkaline Stone Cleaner should be used to break the build-up for stubborn dirt or grease.
- After you’ve applied the cleaner, let it sit on the limestone for about 10 minutes.
- Now scrub the surface with a deck brush.
- Finally, rinse the surface completely with clean water and allow it to dry completely.
This is all about the cleaning procedure, and now you can apply a penetrating sealer to your limestone using a soft cloth.
How to Seal Limestone and Apply Limestone Sealer
Since you’ve checked out how to clean the limestone surface before applying the sealer, it’s time to check out the application process now.
Once you’ve made sure that your limestone is perfectly clean, dry, and free from any dirt, you’re most welcome to follow the steps below.
Guide/ Process / Steps / Way
- Sealing is done on the dry surface. So make sure to dry it using a cotton or microfiber cloth before you apply the sealer.
- Once the surface is completely dry, take the sealer bottle and shake it well before use.
- Now follow the directions below according to the nature of your limestone surface:
- The more absorbent surfaces will require a roller or a paintbrush to get started. You can also use a sprayer as well. You need to apply the sealer generously and evenly on this kind of surface. They also require further coats at hourly gaps until the surface gets completely saturated.
- The honed and polished surfaces will require you to use a lamb’s wool applicator or a soft cloth to apply the sealer. You can evenly yet liberally apply the sealant in this case.
- Allow the surface to dry after application. Wipe off the residual sealer if it’s visible after an hour of application.
- Allow the sealer to puddle up to avoid the residues getting dried or staining the stone.
- Based on the porosity of your limestone, you’d generally require multiple coats. Allow at least 24 hours for the first coating to dry before you apply the second coating. Repeat the above application process during recoat.
Tips: Don’t leave any thick coating on the surface for a longer period as it can be absorbed, causing an uneven darkening. Spread a thin layer of the sealer while applying it to the surface.
How Many Coats of Limestone Sealer Do I Need?
The rule is that you need to keep on coating until the limestone surface gets completely saturated and won’t absorb any more sealer.
But practically, it’s seen that limestone surfaces require at least 3 coats before you apply the grout to them. And then apply as many coats of sealer as are required after the grouting process.
Frequently Asked Questions (FAQs)
Still, have some unanswered questions? Check out these answers to some of the FAQs.
1. How often do you seal limestone?
You will need to reseal your limestone every 3 to 5 years, depending on the frequency of use and traffic.
2. Do you need to seal limestone paving?
Yes, you do. Your limestone should be sealed to prevent the paving color from fading. And you’d generally do it during installation and also recoat it every 2 to 3 years.
3. How do you seal outside limestone?
To seal outside or exterior limestone, mop it with a cleaner and scrub with a deck brush. Then rinse it with clean water, allow it to dry, and apply the sealer using a lambswool or such soft cloth.
Repeat a second coat and finally buff the limestone once the second coat dries using any cotton or microfiber cloth.
4. Does sealing limestone change color?
Sealing doesn’t change the color in the limestone unless you’re sealing a darker stone having a honed finish.
5. What happens if you don’t seal limestone?
If you don’t seal limestone, the surface can turn yellowish, or the looks can deteriorate. As a result, there’ll be discoloration, and it’ll stop looking new-ish over a few months.
6. Can you seal limestone walls?
Yes, you can. In fact, sealing limestone walls could be a way to protect against discoloration and damage.
7. Why you should waterproof the limestone?
Since limestone is a porous material, it allows water or moisture to enter and damage it. So it’s important to waterproof the limestone using a good sealer.
Limestone is a kind of material that deteriorates quickly if not maintained properly. Like other natural stone substrates, it’s prone to staining from grease, wine, moisture, and other impurities. Luckily, you’ve some escape out!
To keep staining to the least and maintain the appealing natural look, the best thing you could do is use one of the top sealers above.
They might vary in terms of formula or making, but when it comes to performance, you shouldn’t get disappointed at all.
The above limestone sealers have been chosen based on the top selection criteria and reviewed thoroughly.
Besides the reviews, the article also discusses the benefits of limestone sealer, the selection criteria, application process, and FAQ answers to make it a more accomplished guide for our limestone lovers.
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