In case of storage tanks, maintenance is very important, mainly from leakage point of view. Irrespective of the material being stored whether it is a chemical, fertilizer or grain, leakage it is to be avoided. Storage tank is to be coated from inside as well as from outside. As storage tanks are robust in structure coating of the tank with proper coat is vital from their protection point of view. If storage tanks are regularly and periodically coated with appropriate paints they can be prevented from internal and external deterioration. Because of paint coatings the walls of storage tanks are protected.