SICONG ® KY30 sandstone repellant for solvent-based products, high solid content in the sandstone surface to form hydrophobic antifouling interface sprayed on the surface of the sandstone and maintain breathability. Can be used in conjunction with the stone underside repellant KY50 or KY55, can effectively prevent efflorescence sandstone salting improve dirt capacity. And to prevent the growth of mosses, lichens and molds, winter will not be due to the expansion of the absorbent icing flaking.