Think Twice Before Using a Silicon-Based Impregnator on a Historic Limestone Building Limestone, a calcium-based sedimentary stone, is a building material that has been utilized for centuries. The Pentagon, the Lincoln Memorial, The Empire State... Read More

When you should clean an old stone building will depend on which climate your building is located in. If located in the northern hemisphere never schedule cleaning during the winter months, since freezing temperatures can cause the stone to spall.... Read More

The spotting can be caused by dripping toilet bowl cleaners, which can etch the marble surface. As of this writing there are no sealers that will prevent acid etching. I would suggest purchasing a non-acidic bathroom bowl cleaner, available at most... Read More

The situation you describe is becoming increasingly popular. It seems designers and architects are mixing different finishes together making it very difficult to restore the polished portion. The only way to restore the polished granite without... Read More

I am assuming that you are talking about burnishing a floor in speeds of 1500 rpm and higher. This is a typical maintenance procedure for certain types of floor finishes and is also used on stone flooring. I have not seen any articles or research on... Read More

First let me say, there are no stupid questions and the one you just asked is actually a good question. I am assuming you mean by age, how old the installation is and not how old the stone is. The stone itself is millions of years old. There are... Read More

Q. I used an oil stain remover made for natural stone on my light whitish-gray quartzite to remove a very faint oil ring. I did only one section and the area turned white, almost bleached. From what I could tell, the stain was gone. I contacted... Read More

Q. I have marble tabletop with a large lemonade stain. I found you via YouTube, and am having difficulty locating your app by name search. Thank you for helping me and so many people out there with stone staining issues. A. Thanks for contacting us.... Read More

Q. I was reading your Stain Management Application about cleaning vinegar stains, and in the types of stains on the left, vinegar is not listed. I was hoping you could clarify what poultice and method to use. Vinegar diluted with water was... Read More

Q. I'm searching all over to find 35% hydrogen peroxide for one of your suggested methods to remove a stain. I cannot find it locally. Do you have an alternative or any tips?  The beauty supply store doesn't sell it anymore.A. Try looking... Read More