We spent over 48 hours researching and testing 13 different types of granite sealer and found that performance, variety of stones it works on, and cost were most important. StoneTech’sBulletProof Sealer scored high marks in all categories and is our top pick. We were able to seal 100 square feet of counter space with this one bottle. The water-based fluoropolymers are long lasting, as long as five years before having to reapply. Application was super easy and curing time was only about 24 hours. It can be used on outdoor surfaces as well and lasts for three years.
Granite sealer is a product that is applied to stone countertops so they remain free of dirt and debris. Sealing the stone is a very important part of keeping your beautiful countertops looking good as new.
This is most important when they are first installed. Sealing your countertops properly prevents oils and stains from seeping into the stone and ruining it. It can make a difference of several years in the life of your countertops.
There are many different types of granite sealers on the market. With all of these choices available, it is important that you have the knowledge you need to choose the right one for your countertops. One of the easiest ways for you to tell that your countertops need re-sealing is to put a drop or two of water on the counter and wait. If it absorbs into the stone, it’s time to reseal your countertops.
The right sealer will take care of your sealing needs and be easy to use as well as performing well. This guide will provide you with the knowledge you need to understand the different types of sealers and how to sort through them.
Top 10 List
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StoneTech BulletProof Sealer, 1-Quart
This advanced sealer from StoneTech is designed to provide users with the maximum protection on natural stone against even the toughest water-based and oil-based stains.
Before using on your entire countertop, be sure to do a spot test somewhere inconspicuous and allow 24 hours cure time.
This quart sized bottle will seal up to 100 sq feet of counter. It is formulated with water-based fluoropolymers that can last up to 5 years on indoor surfaces.
If using outdoors you can expect up to 3 years protection before you would have to reseal the counters.
Application is easy but there are a few things to remember such as sealing in a well ventilated room with surfaces that are roughly 50 to 80 degrees F. Make sure that the surface you are sealing is free of wax or coatings.
It should be applied to damp surfaces one hour after standing water has been removed. Until the surface is completely dry, keep children and pets out of the area.
Tuff Duck Granite, Grout and Marble Sealer 1 Quart
Tuff Duck might sound like a funny name for a sealer but this excellent product provides the maximum protection for all kinds of stone surfaces including grout, travertine, limestone, slate, concrete and granite.
The sealer will not mess up the natural look of the stone tile or countertops.
There is twice the amount of active ingredient in Tuff Duck than in other leading brands of sealers.
This provides users with the right amount of protection with only one application.
Tuff Duck will protect interior surfaces for up to 5 years and exterior surfaces up to 3 years. This non-acidic formula can cover up to 200 sq feet of surface. It has water-based fluoropolymers in the formula that provide excellent protection.
Your important surfaces will be protected from even the most hardcore oil based and water based stains. This high quality sealer is compatible with many porous surfaces including sandstone, terrazzo and much more.
Black Diamond Stoneworks Granite Sealer
Black Diamond Stoneworks Granite Sealer is easy to use and provides long lasting professional results and protection.
All you have to do is spray it on and wipe it off. Your countertops and other natural stone surfaces will be protected from coffee, wine, grease, ink, oil, germs and more from seeping into the stone and ruining it.
This high performing product has been designed and tested by stone care professionals for quality, ease of use and durability.
They have used it to take care of the important stone surfaces in their own homes and businesses.
Black Diamond is non-corrosive and non-toxic too. It is safe for contact with food and can be used on both exterior and interior surfaces.
The low odor sealer is perfect for many types of stone from granite to concrete. All you have to do is apply the sealer, let it seep in and wipe off any excess.
There is a large selection of granite sealers available on the market. Finding the one that will provide your stone surfaces with the protection you want is not hard if you know what to look for. If you are on the fence at all about using a sealer, remember that granite is much more vulnerable to stains and dirt when it is left unsealed.
The three granite sealers featured above are all excellent quality products that provide superior protection for all your stone surfaces. They all offer protection for your interior and exterior surfaces for years without having to be re-sealed.
Learn more about choosing the right granite sealer for your needs by reading the buyer’s guide below. The information contained in this buyer’s guide will help steer you in the direction of the best quality granite sealers so you can make an informed decision as to the one that is the best fit for your needs.
Granite Sealer Categories
There are two categories of granite sealers available to help protect your stone surfaces: penetrating and topical. Either one can be either oil based or water based. The oil-based choices have a strong odor that many may not like; for this reason never user them in a closed area.
Water based choices don’t have a strong odor and doesn’t require the stone surfaces to be dry before application. Both types can also be used on many different types of tile and stone surfaces including concrete pavers, marble, onyx, quarry tile, sandstone, travertine, porcelain tile, brick, clay tile and more.
There are many types of sealers available for protecting important stone surfaces. We’ve listed them below with characteristics of each type. These descriptions will help you understand the difference between them, which means you will have an easier time choosing the one that will work the best for your specific needs.
- Penetrating Sealers – This type of granite sealer does exactly what the name implies. It penetrates the surface, leaving the look of the stone completely unchanged. It does not form a film; it seeps into the stone which means it will never flake or peel. This sealer will not change the COF (coefficient of friction) after it is applied. There are two levels of coverage that penetrating sealers offer:
- Standard – Standard penetrating sealers protect against stains that can be caused by dirt, drinks and other debris. They would not be a good idea to use them in a commercial food service area or residential kitchen. This is due to the fact that these penetrating sealers don’t usually protect from oil-based contaminants at all. Standard sealers are less expensive than the high performance premium sealers.
- Premium – The premium type of penetrating sealers offer the user high performance protection against oil based contaminants in addition to water based ones. It is the perfect sealer to use in residential and commercial kitchens and food service areas. Premium sealers are more expensive but they provide a lot more too.
- Enhancing Sealers – This type of granite sealer enhances and deepens the natural colors of the stone and the natural veining as well. It makes the stone much more vibrant without producing a gloss over the stone. Some of the enhancing sealers on the market are premium sealers which means they protect against oil-based contaminants along with the regular water-based.
- Topical Coating – This product provides stone surfaces with a high-gloss appearance or sometimes a low sheen. They have been called sacrificial coatings because they do wear off with frequent use. They will need to be re-applied more often than a penetrating or enhancing sealer will. It takes more than one application to properly protect a surface with a topical coating.
There are four different variables that determine how often you should reapply granite sealer. These variables are:
- The quality and type of granite cleaner used
- How well the sealer was applied the first time
- The absorption rate of the stone surface (how porous or dense it is)
- What products have been used to clean the countertops (Remember not to use regular household cleaners as these are too harsh and will break down the sealer.)
We have listed the different types of granites and stones and how often they will usually need to be re-sealed.
- Dark colored granite such as greens, browns, blacks and blues can be sealed every 3-5 years. Sometimes they don’t need to be at all. It will depend on the stone surface and the sealant. Don’t forget to check the sealer on a small place out of view.
- Light colored granite and un-polished stone such as some forms of travertine, limestone, onyx and marble will need to be sealed about every 1-3 years.
Some granite sealers are better than others and will be able to keep the stone surfaces protected for as long as 10-15 years when they are taken care of properly. Another factor is the porosity of the surface. Sealers that seep into the stone will break down over time. It’s a lot cheaper to reseal the stone rather than trying to restore the marble or remove stains from lack of proper care.
The best way to truly know when it’s time to reseal is to use the water test mentioned above. This simple test tells you all you need to know about whether it’s time to reseal in a simple, no-nonsense way.
The Water Drop Test Explained
It doesn’t get any easier than the water drop test to check the sealer on your countertops and other stone surfaces. It can help you check the porosity and density as well. Two stones with a high porosity are marble and granite. These stone surfaces should always be sealed to preserve their life.
The water test instructions are:
- Drop the water onto the countertop and leave there.
- If it beads up and stays visible for at least 5 minutes, you will not need to be resealed. It’s also possible that the stone is not porous.
- If the water beads up and seeps into the stone within 5 minutes you have a porous stone or the sealer has started to wear off.
- If the water doesn’t bead up bus immediately darkens and soaks into the stone right away it is important to apply the sealer as soon as possible to avoid any staining.
Make sure that you check the manufacturer’s instructions for application methods and recommended maintenance schedules. Strong cleaning chemicals can break down the sealants and make them ineffective in as little as one cleaning. Use a mild, neutral pH cleaner or warm, soapy water to maintain the beauty and cleanliness of the stones and tile.
Stone surfaces are used in many applications in residences and businesses. They can be countertops, tables, floors, walls and many other things. Making sure that the stone is protected from stains, dirt, oil and other contaminants will maintain the beauty of the stone and also help it last s long as possible.
The way to protect your stone surfaces, wherever they are, is to use a high quality granite sealer that is designed for all kinds of stone. Using this stone upon installation of the countertops or stone surface and then continuing to follow up with re-sealing when necessary will extend the life of the stone and keep it looking beautiful.
The three granite sealers featured above are excellent ways to keep your stone surfaces looking beautiful. All three of them are from reputable brands that customers love. Using the information in this guide to help you choose the right granite sealer will ensure that you have chosen the right one for your needs.
Even though it takes some work to keep stone surfaces protected and looking great, it is more than worth it when you have those beautiful granite countertops for years to come.