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Applying an impregnating sealer to stone will not make it waterproof. The idea of an impregnator is to make the stone water-resistant. In order to make the stone waterproof we would need to completely block the pores of the stone. If this is desired... Read More

If you apply a silicone impregnator to the back of a tile before setting, this may cause a bonding problem. Since most setting mortars are water based they will want to repel the water. Use an epoxy-type setting material. TIP: Before setting any... Read More

When recrystallization is used on Thassos marble, yellowing can occur. The yellowing is probably caused by a reaction of the chemicals in the recrystallization product and the iron in the marble. Not all recrystallization products cause this... Read More

How you dispose of a used poultice will depend on what chemical you used in the poultice. The MSDS should tell you how to dispose of the chemical. MSDS is an abbreviation for Material Safety Data Sheet. The MSDS will contain safety information,... Read More

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

First you need to determine how often and how heavily the bath will be used. Black marbles are typically soft, easily scratched and sensitive to acids; they are also easier to repair than granite, and less expensive. Granite, on the other hand,... Read More

I would call the contractor, but it may not be necessary to replace the panels. These dark circles may be the result of moisture bleeding from the setting mortar. It is common for panels to be installed by spotting the backs of the panels with... Read More

There are several options for making the steps less slippery. Option 1. The steps can be honed and the polish removed. The high-gloss shine will be gone, but the steps will be less slippery. Option 2. Slip tape can purchased at your hardware or home... Read More

I will assume you are not cleaning it with acid cleaners. There is a possibility that there is some residual acid in the grout or the pores of the stone that bleeds out when you take a shower. Try rinsing the shower wall with a solution of baking... Read More

Yes, it is possible to recolor the grout, but it needs to be thoroughly cleaned before re-coloring. If possible, find out what brand and type of coloring was used, and re-apply the same brand or type. TIP Before attempting to recolor the grout make... Read More