The metal-sprayed coating is in itself a complete protective system for iron or steel structures. The use of sealant, however, enhances this protection and also produces a pleasing appearance.
It penetrates and fills the pores, thus reducing the total area of the exposed metal and therefore, the rate of dissolution of the coating.
It smoothes the surface texture preventing the retention of grime and other contaminants, thus reducing still further the rate of surface attack
By smoothing the surface texture the appearance of the coating will remain cleaner and more attractive than without a sealant.