The Mercury Corrosion Guard Engine Protect is a 12 oz spray can rust inhibitor specifically designed to safeguard marine engines and metal surfaces from the damaging effects of corrosion in harsh marine environments. This protective spray forms a water-resistant barrier on both painted and unpainted metal surfaces, making it ideal for under-cowl areas and other exposed engine components. The lightweight formula dries to a clear finish that won't harm paint, plastic, or rubber materials, ensuring comprehensive protection without compromising your engine's appearance or functionality. Suitable for use in both freshwater and saltwater conditions, this corrosion guard helps resist moisture while maintaining a thin coating that won't gum up linkages or attract unwanted debris. Each can includes an attachable straw for precise, targeted application on hard-to-reach areas. Part number 8M0172753 ships as one 12 oz spray can, providing reliable protection for your marine engine investment.