Bel-Ray 99706-BT4-4PK Marine Rust Preventative Coating - 4 Liter Bottle, (Case of 4) Formulated to provide maximum protection against corrosion in the harsh marine environment Easily applied, durable barrier rust preventive Prevents the corrosive environment from direct contact with marine equipment When correctly applied Marine Rust Preventive Coating will provide up to two years of protection against rust and corrosion A waxy, dry-to-the-touch compound in an easy-to-use solvent carrier