Best Granite Sealer Reviews 2017: Top 5+ Recommended

I had a beautiful granite countertop in my kitchen, but it only lasted for a few years before it needed to be replaced.

When that was done, one of the workers asked which granite sealer I was using.

I didn’t know what that was, and he told me that’s probably the reason the last countertop got ruined so quickly.

So, I started looking into the subject and searching for the best granite sealer I could find.

What Does Sealing Do For A Granite Countertop?

Granite and marble countertops seem rather sturdy and long-lasting at first glance, while also being breathtaking to behold. It appears like they will last forever and stay pristine for a long time without much maintenance.

However, this couldn’t be farther from the truth. There’s one question most people don’t ask themselves – is granite porous?

They just don’t mind too much about spillage on granite surfaces and simply wipe it off with a rag or something similar. Stains are not considered important and are just brushed off – it’s a big piece of rock, how could that do harm?

The truth it is, it does a lot of harm. What appears to be a stain on the granite might not be that, but damage to the stone itself.

The difference is that stains can be removed – although it is sometimes difficult (see the video below) – while damage can only be undone by replacing that part of the stone, and is usually caused by chemicals or acidic liquids.

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Over time, damage to the countertop might become so severe that it starts cracking or crumbling; at that point, there is no helping it – the entire thing has to be replaced. That costs far more than you might think.

Granite sealers are meant to prevent such damage (and even simpler stains) from occurring. They are usually made from a petroleum-based solvent, or a resin dissolved in water.

They work by being absorbed into the pores of the stone and hardening, thus sealing them – hence the name. This process stops spilled liquids from being absorbed deeper into the stone, which gives you more time to wipe them and makes any stains that form easier to remove.

Now, the quality of protection this provides depends on a few things. There’s the quality of the stone itself, as well as the effectiveness of the sealer, but also how well the sealer is applied.

First, you need to clean your granite countertop as best you can. Then, apply the sealer evenly on the stone and let it be absorbed before wiping it up and leaving to dry for around 48 hours. Some people don’t wipe the sealer off, which is the wrong thing to do and can damage the stone.

Of course, these are just general pointers on applying a sealer – you should always follow the instructions listed on the label of the product itself, as not all sealers are the same. For more detailed instructions you can check articles like this one.

All of this doesn’t apply just for granite though, but for other countertops made of different stones, like marble, as all stones are porous to some degree.

Do All Granite Countertops Need To Be Sealed?

Considering everything I just said, you might think that you need to seal any stone countertops you might have to stop them from being ruined. Hold your horses, as that is not always the best thing to do.

As noted, all stones are porous, but some less than others. The less porous they are, the more resistant they are to stains, as it’s harder for them to absorb liquids. Granite sealers are also liquid – you see where I’m going with this.

If you apply a sealer to a very dense stone, it doesn’t help keep stains and damaging liquids out of it at all. It only ruins the stone by making stains. Dense stones do not absorb the sealer, so it is left on the surface, dries, and makes a nasty, hazy blotch. Removing a stain like this can be hard and damaging to the stone, so be careful.

You can determine if your stone needs sealing with a simple test. Pour a bit of water on it, watch and time how long it takes the stone to absorb it. If around half an hour or more passes before the water’s absorbed by the stone, or if it’s not absorbed, it doesn’t need sealing. For example, you usually do not need to seal marble countertops.

What A Granite Sealer Doesn’t Do

There are some misconceptions about sealers and what they do for the stone – so here is a list of things they definitely don’t do.

Sealers do not form a protective shell on the surface of the stone – they just seal the pores in the stone, below the surface.

They don’t make the stone stain-proof. The stone can still be stained if liquids are left on it for long enough

Sealing a stone does not protect it from being etched. Physical damage to the stone, like etching and scratches, can still occur even when it’s sealed since sealing has nothing to do with that and only protects from stains.

Another common misconception is that they make the stone shinier – this is not true. If you want your stone to shine, you want to get the best granite polish you can get and look up how to polish granite rock. Some sealers double as polishers though.

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How To Choose The Right Granite Sealer

There are a few things you need to take into account before buying a sealer.

First off is the type you want.

  • Penetrating sealers are the most standard type, the one that just penetrates the stone and seals the pores. There are premium versions as well, which protect better from oil based liquids.
  • Enhancing sealers are a penetrating sealer mixed with a polisher. They have the usual function of a sealer, while also making the stone nice and glossy.
  • Topical coating, as the name implies, actually makes a protective film on the top of the surface, while also giving the stone some sheen. However, they wear out much faster than penetrating sealers.

After that, there is the life span of the sealer – some last longer than others, and there are even those that last indefinitely and never need to be re-applied. It’s usually marked on the label – for example, “15 year granite sealer” or something similar.

Last up is the odor. Granite sealers can smell, sometimes unpleasantly, and that stink can permeate your kitchen for weeks or even months after sealing, so choose wisely.

The 5 Granite Sealers I Tested - Reviews 2017

Here are some of the granite sealers I or my friends tested, to offer you a clue of what to look for:

1. Granite Gold GG0036 – Cheap But Not Worth It

Image Credit: Amazon.com

This is a penetrating sealer made in the US. It’s got easy instructions for use, isn’t toxic and acidic, is biodegradable and contains no phosphates or ammonia, so it’s safe for use in the kitchen. It’s recommended for use on granite, marble, travertine and similar stone surfaces.

It’s a water-based sealer so it should not have any significant odor and it claims so on the packaging as well. However, that’s not true at all, and it smells quite a lot, for a long time too.

Other claims on the label are that it protects the stone from not only staining but etching as well. Even when applied multiple times, as stated on the packaging, it does not do its job properly.

At first, it seems to work fine, but after a few weeks, it’s a different story. Water still leaves stains on the stone if not wiped off very quickly, not to mention any other substances, and acidic liquids still leave etching on the stone.

Still, it’s cheap and comes in a large quantity so it can be re-applied at will, and it probably works better with denser stones than mine.

In the end, it’s just a simple sealer with no added benefits.

Things I liked

  • It’s rather cheap
  • Large packaging for the price

Things I didn’t like

  • Doesn’t protect the stone for a long time
  • Doesn’t protect from etching as stated
  • Smells bad for a long time
  • Just a sealer, not a polisher

2. Black Diamond Nex-Gen Natural Stone Penetrating Sealer - Good Cleaning, Bad Sealing

Image Credit: Amazon.com

This is a penetrating sealer with a water base that can be used in the kitchen as it is not toxic or acidic in any way. It claims to be usable with any surface made of natural stone. Since it is based on water, it should also have a relatively low odor.

Even though the label claims that this is a ‘long lasting’ sealer that is not the case. For granite, it only lasts about a few months before it needs to be re-applied, and even in those few months, the benefits are dubious. It worked great on my bathroom granite, but no so on my kitchen granite, for some reason.

It also stinks, even though it should have low odor. It’s rather greasy as well, so make sure to wipe it off well or it will leave stains on the stone.

This is also supposed to work as a cleaner, and that is a function that it performs rather nicely, but it is not such a good sealer. Still, it doesn’t cost that much.

Things I liked

  • Works well as a cleaner
  • Isn’t too expensive

Things I didn’t like

  • Stinks a lot more than it should
  • Greasy and hard to wipe off
  • Doesn’t last for a long time
  • Works better on some stones than on others

3. TriNova’s Granite Sealer & Protectant – Good Protection, Short Duration

Image Credit: Amazon.com

Here we have a sealer from TriNova that works as a penetrating sealer primarily but offers other benefits. For starters. it’s also a polisher that’s supposed to make the surface of the stone glossy and shiny.

It’s also supposed to work well for re-sealing and doesn’t have any harmful chemicals or bad odors. It comes in an 18-ounce bottle and is usable with any surface made of natural stone.

The good news is that it works rather well, and protects my stone surfaces when applied. It’s also easy to apply, and polishes the granite, giving it a rather beautiful shine that lasts for a long time.

However, the protection itself doesn’t last as long, and it needs to be re-applied after a month or even a couple of weeks if it’s a surface that is often used. Thus, you get through the bottle rather fast, and the amount is not large for the asking price.

Has barely any smell at all, which is a good point.

Things I liked

  • Provides good protection
  • Works well as a polisher
  • Doesn’t have a bad smell

Things I didn’t like

  • The protection doesn’t last for very long
  • Not a large amount for the price

4. Weiman Granite Cleaner & Polish – Cleans But Does Not Polish or Seal

Image Credit: Amazon.com

This is sealer whose primary function is actually as a cleaner and polish, while also sealing some smaller cuts, grooves and general damage in the stone. It also works to enhance natural color and veining making them more pronounced.

It is also usable on pretty much any countertop made from natural stone, and it won’t damage them or leave stains as it is made from safe materials. Well, this is what it claims to do at least.

As a cleaner this seems to work rather fine, taking out smaller stains and dealing with some imperfections and damage, while not leaving any bad smells in the kitchen. Overall, it’s rather good for that purpose.

However, it’s not so good for other applications listed here. For starters, it’s pretty much useless as a polisher as it doesn’t give the stone any shine at all. You’ll still need a proper polisher when using this.

Not good as a sealer either, as it seems to provide no protection despite claiming that it does. All liquids still stain the stone equally even after applying this product.

Things I liked

  • Doesn’t leave any unpleasant smells
  • Works well as a cleaner and fixes smaller imperfections

Things I didn’t like

  • Doesn’t work as a polish at all
  • Not good as a sealer and offers no protection

5. Supreme Surface Granite & Quartz, Cleaner, Polish and Sealer – Two Out of Three SS Not Good Enough

Image Credit: Amazon.com

This is a three in one deal, as this product is supposed to clean, polish and seal your granite countertop at the same time.

It claims to make the colors more vibrant, the surface smoother and more reflective while also offering protection from staining that becomes better with every application. It’s apparently safe to use on all natural stone surfaces.

Well, for starters, this is an excellent cleaner as it works well for removing most stains and dirt from stone surfaces around the house. It’s useful as a polisher too, leaving the surface nice and shiny for a long time, even if the granite is regularly used. It even leaves a nice clean and refreshing scent after use.

However, it seems not to be any good as a sealer. Even after multiple applications and using almost the entire bottle up, it shows no effect. Water still penetrates the stone as it did before.

Moreover, this is a rather pricey product, considering that it does not work as a sealer at all.

Things I liked

  • Good cleaner that takes out most stains and dirt
  • Works well as a polish and makes the stone shine
  • Has a nice clean smell

Things I didn’t like

  • Doesn’t work as a sealer at all
  • Pretty high price for what it offers

The Best Granite Sealer by My Opinion

So, after all of this, what do I think is the best granite countertop sealer?

Well, out of all of these, I prefer to use TriNova’s Granite Sealer & Protectant. It’s a product that has some obvious flaws for sure, especially the fact that it’s a bit costly and needs to be re-applied often.

Despite that, it still offers rather good protection while it lasts and polishes the stone up nicely. Because of all that, it has become my granite sealer of choice.

I hope my experiences will help you find a good granite sealer for your kitchen countertops.

Good luck shopping!

Barbara Whitney
 

For the last 20 years, I’ve been cooking, preparing, researching, and gathering recipes, tools, and knowledge about food and the way we prepare it. Raising two lively boys and spoiling one great husband later, it’s safe to say that I’ve optimized my kitchen to deliver the best possible meal, no matter the occasion.

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