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How to Seal Marble Countertops

How to Seal Marble Countertops
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Last Updated: 11 September 2019

Some people are wondering: «Can marble be sealed? Can I seal my granite countertops? If you are searching for an answer to a question whether natural stone tabletops require to be sealed, you won’t find a clear-cut answer. Different people think different way concerning this issue. And that is not surprising because some stone tabletops don’t require sealing. There exist some types of granite which have high density that’s why the countertops made of them won’t absorb anything preventing this countertop from staining. Still, most of the countertops made of natural stone must be sealed periodically. That’s why it’s important to choose a good sealant to increase the resistance of your tabletop to hard stains. It also makes your tabletop clean and nice. Let’s discuss now how to seal marble countertops and granite surfaces.

Why Marble Countertop Needs Sealing?

What Do You Need for Sealing Natural Stone Surfaces?

Natural stone, marble, in particular, needs sealing because most of the stones have pores, filled with air. This means that some water can seep into these pores leaving hard stains. Take into account the fact that granite is not so porous as marble, for example, when installing a countertop in your apartment. Choose the best marble sealer for sealing your natural stone tabletops.

What Do You Need for Sealing Natural Stone Surfaces?

If you are wondering how to seal marble or another natural stone, this information will be useful for you. It’s not difficult to seal the countertops made of natural stone. This whole process will take about an hour of your time. All you need are:

  • Cleaner for natural stone
  • Microfiber fabric
  • Granite, natural stone or marble sealer.

Sealing Natural Stone

Over time, all natural stone surfaces must be sealed. Sealing natural stone can be done every year, every three years or every five years; this depends on the type of your stone and its finish.

If you intend to know how to protect marble countertops, here is our advice — apply only professional solutions. As a rule, all professional solutions have warranties that guarantee they protect your tabletop for a period indicated on its label. Read the instruction on the label if you want to know how often to seal marble countertops.

Step 1. Perform a Water Test

Step 1. Perform a Water Test

To understand whether your stone tabletop needs sealing, do a simple test. Sprinkle a few drops of water on different spots on your tabletop and wait for a half an hour. If these spots will start darkening, you need your tabletop to be sealed then. If a stone absorbs some water within four minutes, it’s time for sealing your countertop. You don’t need a marble sealer if the water drops stay in place. Don’t forget applying only the best marble sealer for these purposes.

You must do this simple test is recommended every few months to prevent your natural stone from staining.

Step 2. Clean Your Marble Counters

Prepare your countertop by cleaning a surface first. Apply granite or marble cleaner for these purposes. Don’t apply the household cleaning products you’ve purchased in a store because they can damage your marmoreal surfaces after a while. Apply only the best marble sealer if you want your marble surfaces to look nice

Here are some simple marble sealing tips for those who want to know how to care for marble countertops:

Step 2. Clean Your Marble Counters
  • You can remove coffee spots by applying soft cotton balls or a terry towel dampened in bleach. Put them on your coffee spots and leave them for a night, rinse your countertop with some water the next day.
  • For getting rid of oil spots, apply a mixture of baking soda and acetone. Put this mixture on your oil spots and leave it for one day and wash out the next day.

Don’t forget your countertop must be carefully cleaned before you apply your sealant. Remember, this solution will also seal all hard water stains and other stains which have appeared on your tabletop’s surface with time. Try removing them all. Dry your countertop completely after it had been cleaned. You can seal your marble countertop in the best possible way by making sure that it is totally dry.

Step 3. Apply Sealant

Step 3. Apply Sealant

Follow instructions specified by a fabricator on its label. Various types of stone may require various applying techniques and various amount of sealant. Don’t ignore an applying instruction if you want to seal the marble countertops in the most effective way.

The coating recommendations are also various. Some manufacturers advise 1 coating, others may advise 2 or more coatings.

Follow these recommendations for achieving the optimal results:

  • Read the precautionary measures specified on its label.
  • Do testing of your product on a small area of your tabletop. Wait for one day until you see the results are satisfactory.
  • Put some sealer on clean, dry stone.
  • Put proper quantity of sealer.
  • Follow the manufacturer’s recommendations concerning the time you should wait before you apply additional coats of sealer.

Make some preparations before applying your sealant

  • Some sealants are being used as sprays, so make sure that all surfaces where a sealer’s splattering is undesirable are protected. Use plastic sheeting for protecting your surfaces.
  • Protect your wall from a sealant. Use a newspaper, for example, and place it between a tabletop and wall during the process of sealing.
  • Make sure all components of a sealant are well mixed if you are applying a homemade one. Mix these components in accordance with instruction if you are using a store-bought product.
  • After it had been sprayed on a tabletop, wait for five minutes until the stone soaks this sealant. If there are manufacturer’s recommendations, wait the needed length of time indicated there.
  • Don’t apply a solution on the whole surface, cover some small areas first. You can wipe it off in this way if needed.

Step 4. Remove your Sealant

Step 4. Remove your Sealant

The next step a person who wants to know how to seal marble must do is to eliminate some extra sealant from the surface you’ve sealed. Your stone has soaked a needed quantity of a sealer; the rest of it must be removed.

Remove an excessive sealer before letting it be dried. Remove it by using a soft cloth; the best is using a microfiber cloth which doesn’t leave a fiber on a sealed surface. Sometimes, there is no excess of sealer on a countertop. This means that you’ve applied an exact quantity of your sealer and a stone has absorbed it all. If you see that there are sealant’s remnants, apply some sealer again and wipe off any excess.

Integrate Resealing into a Maintenance Routine

Do the water test several weeks after you first sealing. If the water doesn’t soak into a stone, your sealing is solid enough. However, you can do a sealing as often as you want, there won’t be any damage.

What Not to Use for Sealing

We don’t recommend you to use these things when you are sealing a granite countertop:

Don’t apply sealers with citrus components, with flaxseed oil, sealers which contain silicon or siloxane. Citrus and flaxseed oil can discolor your granite. The best option is a sealer based on mineral oils.

If you intend to know how to seal marble surfaces in the best possible way, it’s better not to use sealers containing citrus and flaxseed components, surface sealers.

What Not to Use for Sealing

Some people, who try to understand how to seal marble in the best possible way, think that their marble countertop needs sealing if they see etchings on it. But etching is not a spot, in fact, it occurs due to some changes in the chemical composition of marble. It’s a result of acid and calcium interaction. Marble is a calcium-based stone that can interact with acid. When acid-containing products such as lemons, vinegar and so on contact with a marble, a chemical reaction occurs, creating etchings.

That’s why we recommend you not to use acid-containing solutions to seal marble. Your marble countertop will be damaged in such a way.

Incorporate Resealing into a Maintenance Routine

Flaxseed and tung oils are also not recommended. They will make your marble look yellowish with time.

We hope that this information was helpful. What recommendations can you give concerning natural stone surfaces sealing? How did you seal your stone surfaces? Share your experience.

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