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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

The yellowing and graying of certain Italian and Greek white marbles is a common problem that I see all over the country. There are several possible causes for this condition: Maintenance technique-Take a close look at your maintenance program. Are... Read More

I have been poulticing a stain on a red granite counter top using a clay poultice and a commercial degreaser. When I remove the poultice the area where the poultice was is very dark and does not seem to dry out and lighten. What causes this and how c

This is a very common problem on granite. Granite is a very porous stone, more porous than most marble. Because of its porous nature, granite has the ability to retain a great deal of moisture. The dark area in this case may simply be excessive... Read More

We just sealed our marble tile with a water-based sealer. There is now a light, rainbow-like film on the surface of the tile. I have used every cleaner I could purchase to try get it off, but it won’t budge. Any suggestions?

The sealer has left a hard silicone residue on the tile’s surface. To remove the excess silicone, the tile will have to be scrubbed with an abrasive cleaner. Several kitchen-type abrasive cleaners are available which will remove this film. If... Read More

How do I repair cracks in terrazzo?

Small cracks in a terrazzo floor can be repairs as follows: Clean the crack with acetone, making sure to remove all dirt, old wax and other debris. A dental pick is helpful in removing old wax buildup. After the crack is cleaned you will notice that... Read More