These coatings used in marine weather or near high moisture area. These are mainly used to prevent the corrosion of metal and avoid the loss of the metal due to corrosion. The metal gets oxidized and looses its strength and property of supporting structure. This can be prevented with the help of suitable product. The product should be chosen after considering the main causes of the corrosion. If the corrosion is due to any other reason than moisture, then the chemical resistant coating should be used