How to Remove Plumbers Putty Stains from Marble

Frederick M Hueston, StoneForensics.com

Removing plumber’s putty stains from marble using a poultice with a strong solvent can be effective for stubborn stains. Here’s a detailed guide:

Materials You’ll Need:

Acetone or mineral spirits (strong solvent), If you can find a solvent with Methylene Chloride for best results.

Baking soda or diatomaceous earth (absorbent material)

Plastic wrap

Painter’s tape or masking tape

Plastic scraper or credit card

Soft, clean cloths

Hydrogen peroxide (for lighter-colored marble)

Marble sealer (optional, for protection after cleaning)

Step-by-Step Instructions:

Remove Fixtures

Be sure to remove any fixtures and remove the plumbers putty before proceeding.

Test in an Inconspicuous Area:

Before proceeding, test the solvent you intend to use in a small, inconspicuous area of the marble to ensure it doesn’t cause damage or discoloration.

Prepare the Poultice:

Create a poultice using an absorbent material like baking soda or diatomaceous earth mixed with the strong solvent (acetone or mineral spirits). The consistency should be like a thick paste.

Apply the Poultice:

Apply a thick layer of the poultice mixture directly onto the plumber’s putty stain.

Make sure the poultice extends slightly beyond the edges of the stain.

Cover with Plastic Wrap:

Cover the poultice-covered area with plastic wrap to prevent the poultice from drying out too quickly.

Seal with Tape:

Secure the plastic wrap in place using painter’s tape or masking tape around the edges.

Allow the Poultice to Work:

Let the poultice sit on the stain for at least 24 to 48 hours. This extended contact time allows the solvent to penetrate and break down the putty stain.

Remove the Poultice:

After the waiting period, carefully remove the plastic wrap and gently scrape away the dried poultice using a plastic scraper or credit card.

Be cautious not to scratch the marble surface.

Clean the Area:

Dampen a clean cloth with a small amount of acetone or mineral spirits.

Gently wipe the area to remove any residue left behind by the poultice.

Rinse and Dry:

Wipe the marble surface with a clean, damp cloth to remove any remaining solvent residue.

Dry the area with another clean cloth to prevent water spots.

Hydrogen Peroxide (For Lighter-Colored Marble):

If the stain persists or if you notice any residual discoloration, you can apply hydrogen peroxide to the area. Apply a small amount of 20 Volume hydrogen peroxide to a cloth and gently blot the area, then rinse and dry.

Marble Sealing (Optional):

Consider applying a marble sealer after cleaning to protect the marble from future stains. Follow the manufacturer’s instructions for application.

If you’re unsure or uncomfortable with the process, it’s best to consult a professional stone restoration expert.