Remove Hardened Tar From Marble Flooring

If tar was tracked into your house by a visitor and has hardened and stained the marble flooring in your home's foyer as a result, successfully remove it with the following steps. Afterward, take some measures to prevent the marble from becoming prone to staining in the future. 


  • commercial poultice powder
  • distilled water
  • baking soda
  • bucket
  • mixing stick
  • plastic sheeting
  • masking tape
  • sponge
  • mineral spirits
  • lint-free cloth
  • soapy water
  • towel
  • marble polish
  • buffing pad

​Apply A Poultice

A poultice is a mixture that is often used to absorb stains from porous surfaces. You can use a commercial poultice product or a homemade one to help lift the tar from the floor. If you choose a commercial one, follow the directions on the back of the package to determine how much water will need to be added to it. Add the powder and the water to a bucket and stir them until they are well-blended. Apply a thin layer of the mixture to the dry tar with a sponge.

If you choose to make a homemade poultice, add equal amounts of baking soda and water to a bucket. Stir them until they are blended and apply the mixture in the same manner as you would with the commercial product. 

Cover The Poultice

Place plastic sheeting over the poultice. Tape the edges so of the plastic so that no air can penetrate. Leave the plastic on the floor for a couple days to allow plenty of time for the mixture to absorb the tar. Once plenty of time has passed, remove the plastic. Use a wet sponge to remove the poultice. If traces of tar remain on the floor, pour a small amount of mineral spirits onto a lint-free cloth and wipe the stains with it.

Clean And Buff The Treated Portions

Clean the treated portions of the floor with a sponge that has mild detergent that has been mixed with water applied to it. Afterwards, rinse the sponge out with plain water and wipe up any soapy residue. Dry the floor with a towel. If there are any faint marks in the marble's surface, pour a few drops of marble polish onto a buffing pad. Move the pad in small circles over each mark until they have all been eliminated. Remove excess polish with a cloth.

Keep the marble flooring protected by placing a floor mat near the entrance way to your home. Ask visitors to remove their shoes before entering your home, especially on rainy days. If you notice any dirty residue on the floor, remove it quickly before it hardens. These simple steps will help retain the floor's appearance.