The historical buildings exposed to environmental conditions are inexorably subjected to different decay processes mainly due to the presence of water. The dissolved salts present in this water, can crystallize as their anhydrous or hydrated form, producing damage to the materials, often only aesthetic but sometimes much more serious and irreparable. Thus, a crucial strategy to mitigate the decay processes is reducing the water absorption and, in some cases, apply a consolidant product. With this purpose, the aim of the present study is to evaluate the effectiveness of different consolidant products on a historical stone.