The WD-40 450ml smart straw lubricant is an all-purpose liquid for displacing moisture, corrosion control, lubrication, cleaning and penetration. It can penetrate the minute grain boundaries on all the metals. WD-40 protects the metal from rust and corrosion, penetrates stuck or jammed parts, displaces moisture and lubricates just about anything. It is also great when it comes to cleaning grease, grime and other marks from most of the surfaces. This product is a mixture of chemical concentrates suspended in a high-grade petroleum distillate.