Wilson Combat Carbon Remover is a nonflammable specially formulated material used to remove the spent carbon and firing residue from your firearm. It is especially effective on black powder residue. Carbon Remover will also loosen copper fouling. When combined with our Bore Polish, you will find no better cleaning system. Carbon Remover contains NO ammonia and will not harm metals. Quickly removes powder fouling and carbon build up Ammonia free Non-flammable Effective on black powder residue WARNING: This product can expose you to chemicals including petroleum products, which are known to the State of California to cause cancer and reproductive harm.