Hoppe's Traditional #9 solvent cleans fouling and loosens abrasive dirt from firearm parts to prevent wear and protect your investment. A strong rust inhibitor, it protects your firearms from costly corrosion damage and aids in cleaning and preventing carbon and lead build-up in barrels to maintain top accuracy. It helps keep firing pins and strikers clean and moving freely to prevent light strikes and misfires. And of course, it has a classic smell that only comes with Hoppe’s No. 9. High-viscosity oil refined to perfection. Ideal for firearms, fishing reels and other precision mechanisms. Extra-long lasting. Does not harden, gum or expire.