How to Seal a Marble Bathroom Counter Top

Marble bathroom countertops are a luxurious and elegant addition to any bathroom. However, marble is a natural stone that requires proper care and maintenance to keep it looking scratch and stain free. Considering the cost of marble countertops, it’s worth it to take a few minutes to seal and protect your investment. Today I will show you how I sealed my marble bathroom vanity top in six easy steps.

Finished sealed marble bathroom counter.

Why Seal a Marble Bathroom Vanity? Marble is a porous stone, which means it can absorb liquids and be susceptible to staining. Common bathroom items like toothpaste, soap, and cosmetics can leave stains on marble if not properly sealed. Additionally, marble is sensitive to certain chemicals and acidic substances, which can etch or damage its surface. Sealing a marble bathroom vanity creates a protective barrier that helps prevent liquids from penetrating the stone and staining it, and it also guards against damage from harsh chemicals.

Cleaning a marble bathroom vanity with a ph neutral cleaner to prep it for sealing.

Materials and Tools Needed:

  1. Marble sealer: Choose a high-quality, penetrating sealer specifically formulated for marble. Avoid using acidic or abrasive sealers that can damage the stone.
  2. Clean, lint-free cloth: Choose a soft, white cloth that won’t scratch the marble surface.
  3. Marble cleaner: Use a pH-neutral cleaner specifically formulated for marble to clean the vanity before sealing it.
  4. Marble polish (optional): Make your vanity shine after it is cleaned and sealed.
  5. Gloves (optional): I didn’t use gloves but if you are sensitive to chemicals or just don’t want to get them on your skin you should put on some vinyl gloves.
Sealing a marble counter with Granite Gold Sealer with a rag.

Time needed: 30 minutes

How to Seal a Marble Counter top

  1. Clean the vanity

    Start by thoroughly cleaning the marble bathroom vanity. Use a pH-neutral marble cleaner and a soft cloth to wipe down the surface, removing any dirt, grime, or soap residue. Make sure the vanity is completely dry before moving on to the next step.

  2. Apply the Sealer

    Shake the marble sealer well before using it. Pour a small amount of the sealer onto the vanity surface, and spread it evenly using a clean cloth. Be sure to cover the entire surface, including the edges and corners, with a thin, even coat of sealer. Avoid applying the sealer too thickly or letting it puddle, as this can result in an uneven finish.

  3. Allow the Sealer to Penetrate

    Let the sealer penetrate the marble for the recommended time as per the manufacturer’s instructions. The sealer will need about 10-15 minutes to absorb into the pores of the marble and create a protective barrier.

  4. Wipe off excess sealer

    After the recommended time has passed, use a clean, dry cloth to wipe off any excess sealer from the vanity surface. Make sure to remove all the excess sealer to prevent streaks or haze from forming on the marble.

  5. Allow the Sealer to Cure

    Let the sealer cure for the recommended time, usually 24 to 48 hours. During this time, avoid using the vanity or placing any items on it to allow the sealer to fully cure and create a durable protective barrier.

  6. Perform a Maintenance Test

    Once the sealer has cured, perform a water test to ensure that the marble vanity is properly sealed. Pour a small amount of water onto the surface of the vanity and let it sit for a few minutes. If the water beads up and does not penetrate the marble, then the sealer is working effectively. If the water absorbs into the marble, it may indicate that the sealer needs to be reapplied.

  7. Polish (optional)

    You can polish your marble after sealing it. Wait at least 24 hours so that the sealer can cure and then spray polish on to the marble and buff it with a soft, lint free cloth.

Frequently Asked Questions

How often should you seal marble countertops?

Seal your marble countertops every six months to one year.

What kind of cleaner should I use on marble?

Use a mild pH, non acidic, gentle cleaner on marble. A commercial cleaner that is made specifically for natural stone, granite and marble is your best bet.

Can you use Dawn dish soap on marble countertops?

A small amount of mild dish soap, like Dawn, mixed with water is a safe way to clean marble. Just make sure you don’t use dish soap that is abrasive or contains acidic ingredients like lemon juice or vinegar.

Can I use a Magic Eraser on marble?

Its best to avoid using Magic Erasers on marble. They are too abrasive and can scratch the stone.

Close up of bathroom sink with marble. counter and mirror behind it
Adrienne Carrie Hubbard
Latest posts by Adrienne Carrie Hubbard (see all)

Leave a Comment

Your email address will not be published. Required fields are marked *