Q. I think the cleaning company spilled toilet bowl cleaner on my black granite floor and it left a stain.  What do I do? A. There are several possibilities. One, it is possible that you have a stone that has been 'doctored.' Some less... Read More

It is probably not ruined, but removing this whitish haze can prove difficult. If the black marble is an agglomerate, chances are the alkaline stripper has attacked the polyester resin that binds it together. If so, the surface will have to be honed... Read More

Many green marbles will not have the depth of shine that other marbles have. The greens from Asia are some of these types. The surface will have a good shine but little clarity.Unfortunately there is not much that can be done to give the stone any... Read More

Some agglomerate tiles are poorly manufactured and will have tiny air holes which open up when ground. This most likely what happened in this case. These tiny holes are so small that it is difficult to get grout and polyester to flow into them. To... Read More

Q. Help! I think my new cleaning lady might have accidentally applied diluted bleach (but I'm not sure) to my Crema Marfil countertop. It has a white film and seems to have lightened the color of the countertop in some parts. Is there anything I... Read More

What Impregnator is Supposed to Do Ideally, when impregnator is applied to stone, it penetrates into the pores of the stone. However, this isn’t always the case.  What Causes Impregnator to Bead Fred Hueston, Chief Technical Director of... Read More

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

Q. We are building a new house in South Louisiana. We have a 4-inch concrete slab on the ground. Because we are in a flood zone, we had to build up. So, we have concrete piers and wooden beams that our house actually sits on. We then have 1 1/4"... Read More

Q. I accidentally wiped my limestone fire surround on one side with a cloth that had WD-40. It has discolored  the limestone that is stone in color. The discolored area is a few shades darker. How can I bring it back to the lighter color it should... Read More

Q. I accidentally left a candle on my wood burner, lit a fire and the wax melted. The candle was on a saucer which collected most of the wax. When I moved the candle and placed it on the hearth, I spilt the wax. After it had cooled down I lifted the... Read More