Breakthrough Clean Technologies, Carbon Pro, Bore Cleaner, 1 Gallon Can California Prop 65 WARNING. These products contain a chemical known to the state of California to cause cancer, birth defects and other reproductive harm. Lead: Cas-No. 7439-92-1 Removes carbon and lead deposits Reduces the duration of cleaning and frequency between cleanings Petroleum & ammonia-free Short term Rust and Corrosion prevention Barrel safe 100% Biodegradable Virtually Odorless Non-flammable Made in the USA Product Description Carbon Pro is a water-based, ammonia-free, cleaner that removes heavy carbon and lead deposits. Utilizing a proprietary blend of chemical surfactants and detergents, Carbon Pro effectively works to neutralize all corrosive residues preventing damaging rust and corrosion without etching or harming the barrel's steel surface. With no noxious fumes or hazardous chemicals, Carbon Pro is a safe and effective choice when it comes to removing stubborn carbon & lead build-up and cleaning the bore of your firearm.