Non-toxic and odorless, Bore Cleaning Foam chemically removes copper and brass compounds from the barrel in 15 minutes, and leaves a protective film behind to impede the accumulation of residue. Bore Cleaning Foam has a pH value of 12 and can be used between the temperatures of -22� and 122�F. Packaged in an aerosol can, Bore Cleaning Foam is easier to use than other ammonia-based products. In addition, this cleaner also removes normal combustion waste from your gun's barrel, eliminating the need for a second cleaner.