CRC 5-56 is a multi-purpose product with superior penetrating power that breaks through rust and corrosion while it clears away scale and dirt. Eliminates the need for many disassembly operations. Lubricates for smooth action, and silences annoying squeaks and squeals. Protects metals against corrosion and displaces moisture to help start wet engines.Moisture eliminator for wet equipment. Moisture barrier to prevent trouble before it starts. Protective film seals out moisture. Lubricant - will give lubrication where it penetrates, restoring smooth action and silencing annoying squeaks and squeals.Recommended for penetrating rust and corrosion, freeing components bonded by dirt & scale, preventative maintenance programs, as an environmental shield eliminating breakdowns due to poor environmental exposure, such as high humidity/salt air, for lubrication of contacts.