Superhydrophobic siloxane based coating for enhanced protection of historical limestone surfaces

The silane and silioxane are widely used as stone strengthening agents for enhanced superhydrophobic properties. Outdoor historical stones suffer very sever environmental condition. Protection and strengthening stone artworks against environmental factors are very important. Humidity is one of the most destructive factors due to plays an important role mediating in many of the degradation reactions. For this purpose, the use of conservation materials based on silane and siloxane resins can be used to better stability of the limestones against environmental changes. In this study, two type of coatings based on mixed of silane/siloxane dilutable with organic solvents and with a water-thinnable as potential coatings for protection and hydrophobic studied on the limestone were compared. The experimental tests such as contact angle on the coated samples were measured. The results approved the coating dilutable with organic solvents can be created the better protection choice