T-7 bore cleaner is a foaming agent. This scrubbing cleaner actively works on cleaning your bore. The foam penetrates even the most caked on fouling and eliminates the need to brush your barrel. Simply spray into your barrel and let stand for 1-hour. The foaming agent does all of the work for you. Wipe your barrel clean and treat your barrel with T-7 Seasoning patches to prevent rust. 7oz. can.