Does treatment with silicones have any major effect on the resistance of concrete to weather and ice-melting chemicals?
There is mounting evidence to indicate that silicones are beneficial. Most of the curbing on a New York state highway bridge was treated with water soluble sodium methyl siliconate at an optimum concentration of 2 percent silicone solids. Two years later this non-air-entrained concrete showed no signs of spalling in the treated sections, while the untreated control section was heavily spalled. Silicone treatment also has a valuable safety feature, since it keeps the light reflectance of wet concrete very close to that of dry concrete, as compared with the 35 to 50 percent reduction which takes place when untreated concrete becomes wet.