Its 550ml not 500ml

CRC 5.56 is a multi-purpose product with superior penetrating power that breaks through rust and corrosion while it clears away the scale and dirt. Elimates 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.

Applications:
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 lubricatation of contacts.