Degreases and browns in the same application. Solvent cuts through oil, grease, or film to give an even, streak-free brown. This easy to use treatment does not contain mercury and requires no special equipment. Goes on cold so you don't have to heat the barrel. One 2-1/2 oz bottle contains enough solvent to brown many complete rifles. Notes: Applied cold in 3 hour intervalsColor varies from a reddish-brown to a dark chocolate depending on number of applications