The Breakthrough Clean 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 barrels steel surface. With no noxious fumes or hazardous chemicals Carbo Pro is a safe and effective choice when it comes to removing stubborn carbon & lead build-up and cleaning the bore of your firearm.