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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

Why You Should Apply Impregnator to Stone When It's Dry

The stone should be completely dry for the sealer to work at its best. If the stone is still wet the sealer will not penetrate areas were water is present and therefore that portion of the stone will be unsealed. If the stone has some moisture(damp),... 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

Here’s a question my customer has asked and I don’t quite know how to answer. “Every time it rains, a blotchy light-and-dark stain appears on my granite sidewalk. If it stays dry for several weeks, it goes away. What is happening, and can

Most granite is very absorbent, and will soak up a large quantity of water. What your customer is seeing is moisture in the granite, which can take anywhere from several days to several months to dry out. Once the granite dries apply a penetrating... Read More

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