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Do Not Mix Chemicals for a Poultice Most grown adults know that chemicals can be dangerous. Sometimes when people are creating a poultice for stain removal on natural stone or other surfaces, they consider mixing chemicals without realizing that... Read More

Poulticing Walls and Other Vertical Surfaces Making sure that a poultice is held securely in place is important for several reasons: The poultice needs continuous contact with the surface to work properly. If the poultice shifts off of the stained... Read More

But first, is it advisable to speed the dry time of a poultice? Before we speed the drying time of a poultice, we should first consider whether it would be advisable to do so. You should only speed up the drying time on a poultice if the poultice has... Read More

Graffiti Removal Procedure for Stone, Masonry, and Tile Surfaces By Frederick M. Hueston, www.stoneforensics.com If your beautiful building, wall, or other surface has just become the unintended canvas for graffiti, your first reaction might be to... Read More

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

To properly apply an impregnator it is important that the stone is thoroughly saturated with sealer. If too much sealer is applied it will puddle on the surface. This excess should be removed, otherwise it will dry and form a sticky residue. If this... Read More

Generally, an acid will not cause any problem with an unglazed terra cotta. However be sure to use a acid specifically called for in the cleaning of terra cotta. Follow the directions carefully and be sure to rinse throughly to remove all acid... 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

Once a stain is removed, it may come back, depending on how deep the stain is or what caused the stain in the first place. If the stain is coming from behind the stone, chances are it may come back. If this is the case and the stain reappears I would... Read More

A poultice is a chemical mixed with an absorbent material that is applied to a stone or other materials. A poultice can be used on surfaces other than stone. Poultices can be used on a variety of surfaces, including concrete, brick, wood, and even... Read More