Stone and Tile PROS | Natural Stone, Tile, Concrete | A service of...
Your Stone and Tile Information & Resource Super Site

How to Remove Plaster Stains on Slate

Q. When we had our new slate hearth put in a few years ago we also had our living room plastered the following day. The plasterer did not put any protective dust sheets down which resulted in our beautiful new hearth being stained with plaster solution. It’s really ruined the whole look of our new hearth and wood burner. Is there anything that I can do to draw out the stain? I’ve looked everywhere online to try and find a solution but so far haven’t found any help anywhere else. We live in Northern Ireland! 

A. Thanks for contacting us with your question. We are always happy to provide instructions on how to remove stains from natural stone. First, try cleaning the slate with a soft scrub brush and a solution of dish soap and water. If the plaster residue loosens up at all, keep cleaning until it is completely removed. If it does not loosen up, then try the poulticing method. A poultice is an absorbent material applied to the surface of natural stone to draw out a stain. For the type of stain you described, the most appropriate poultice ingredients would be a tablespoon of Dawn dish soap per cup of flour and enough water to create a paste with the consistency of peanut butter. Visit our Stain Removal Application for detailed instructions on the poultice method, including a how-to video. If the poultice loosens the plaster residue, try cleaning the slate with a soft scrub brush and a solution of dish soap and water again. You may need to reapply the poultice and clean the stone several times to achieve the desired results. Once the stone is clean, rinse with distilled water and buff dry with a soft cloth. For further assistance, contact your stone restoration professional. Click here to find a SurpHaces PRO Partner in your area.
0 (0)
Article Rating (No Votes)
Rate this article
Attached Files
There are no attachments for this article.
There are no comments for this article. Be the first to post a comment.
Security Code Security Code
Related Articles RSS Feed
How To Remove Oily Candle Wax Stain On Sandstone
Viewed 406 times since Mon, Feb 11, 2019
Can one re-dye or darken Black Galaxy granite?
Viewed 428 times since Mon, Feb 11, 2019
How to Remove Tannin Stains on Porcelain
Viewed 105 times since Wed, Apr 22, 2020
Will A Hydrogen Peroxide Poultice Bleach New Caledonia Stone?
Viewed 392 times since Fri, Mar 1, 2019
How to Remove a PVE Oil Stain On Natural Stone
Viewed 1948 times since Thu, May 18, 2017
What sealer should I use to make my travertine shine again?
Viewed 340 times since Wed, Apr 22, 2020
White Marble turning Yellow
Viewed 2605 times since Wed, Jan 6, 2010
Recommendations for Removing White Marks on Kota Stone
Viewed 1366 times since Mon, Feb 11, 2019
Can Dye Be Removed From the Limestone
Viewed 830 times since Tue, May 15, 2018
How to Remove Vinegar Stain on Mosaic Tile
Viewed 224 times since Mon, Nov 18, 2019