RB-17 Gun Cleaner is a non-toxic, biodegradable gel made of natural products that contains no acids, phosphates or petroleum by-products. RB-17 Gun Cleaner completely dissolves (deep cleans) rust from all metal parts in seconds by removing the oxygen molecule from the process of oxidation. The breakdown of the oxides, i.e. lead, copper or iron, is done quickly and safely. RB-17 Gun Cleaner removes the rust off of your blued gun without harming the bluing. RB-17 Gun Cleaner will dissolve/remove lead, copper and brass build-up from the bore. When applied to the bore it will dissolve or dislodge any lead or copper that may have built up in the lands and grooves. RB-17 Gun Cleaner will also remove plastic build-up from the bore of your shotgun. RB-17 Gun Cleaner will remove old gun oil, hand stains and worn varnish from the gun stock. RB-17 Gun Cleaner removes powder burns found on the cylinder of stainless steel and chrome revolvers. RB-17 Gun Cleaner will dissolve black powder residue off any black powder pistol or rifle.