The Thompson/Center T-17 Foaming Bore Cleaner effectively cleans and neutralizes the harmful fouling in the bore of the rifle. The foaming bore cleaner is specifically engineered to clean traditional black powder and black powder substitutes. The T-17 Cleaner also helps to remove plastic, copper and lead deposits left behind in your bore, that can effect the accuracy of your rifle. The Foaming Bore Cleaner is easy to use and leaves a micro thin film of protectant in the bore to prevent rust and corrosion. The 7 ounce can of T-17 foam penetrates even the most caked on fouling and eliminates the need to brush your barrel. Simply spray the foaming solvent into your barrel and let it stand for one hour. The foaming agent does all of the work for you. Wipe your barrel clean and treat your barrel with T-17 Seasoning patches to prevent rust.