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  1. Can Dye Be Removed From the Limestone Q. Our limestone fountain is dyed on special occasions. The purple dye is penetrating the limestone at the bottom of the wall. How can the purple dye be removed from the limestone? I have tried acid and chlorine. Any suggestions? A. Than... Read More
  2. We have Italian marble on the lobby floors in our commercial office buildings. Recently, we have noticed several problems: 1. Entire tiles are evenly discoloring yellow or grey and 2) Rust-like stains are appearing in an area near the door. What is c The yellowing and graying of certain Italian and Greek white marbles is a common problem that I see all over the world. There are several possible causes for this condition:  Maintenance technique: Take a close look at your maintenance program.... Read More
  3. The grout on my ceramic tile floor is discolored. I tried cleaning it, but the colors are now different. Is there a way to color the grout? Grout ColorSealing is a perfect solution for you. Most tile and grout cleaning companies offer this service now. One major caveat: you want to be careful to use a company that uses a quality color seal product. Some companies are out there selling th... Read More
  4. Grout has stained lueders limestone Q. We had a new lueders limestone fireplace surround installed. There are darker stripes on each side of all grout lines. Installer said grout was not acrylic, but grout did have some colorant. Stone has dried now three weeks and stains still present... Read More
  5. Why White Marble Turns Yellow: Causes and Cures Fred M. Hueston, PhD Sitting in my office one morning I received a call from a very upset home builder. He told me he was building a two million-dollar home on the west coast of Florida. They had installed nearly 3500 square feet of a white st... Read More
  6. Can enhancing sealing be removed? Q. The installer of my granite countertop used a color enhancing and impregnating sealer.  I wish he would have asked if I wanted the deepened color. Is there any way to return the granite to the original color and then reseal with non enhancing... Read More
  7. Can you please provide some definition of Sealer for Stone? Q. Can you please provide some definition of Sealer for Stone?A. Excellent question! For starters, when referring to stone, the word sealer is wrong. Well, technically it is not, but the reason why I said that it is wrong is because sealers for stone... Read More