Birchwood Casey Perma Blue Liquid Gun Blue 3 oz Bottle

The Birchwood Casey Perma Blue Liquid is the proven cold gun blueing formula that gunsmiths and hobbyists have relied on for decades to restore and refresh worn blued finishes on steel firearms (not for use on stainless steel). Sold in a convenient 3 oz plastic bottle, this fast-acting liquid goes on evenly and cuts the time needed to bring a tired-looking gun back to a deep, rich blue-black.

Applied to a properly cleaned and degreased steel surface, Perma Blue Liquid chemically converts the top layer of metal to deliver a uniform, non-streaky blue-black finish that closely matches traditional factory hot-bluing. Swab a thin, even coat onto the part, allow the reaction to develop, then neutralize and oil the surface for a long-lasting protective finish. It is equally at home refreshing small parts like screws and trigger components or tackling larger surfaces such as receiver sidewalls, barrel bands, and sideplates.

This 3 oz Birchwood Casey Perma Blue Liquid Gun Blue (model 13125) is suited for virtually any blued or unfinished carbon-steel firearm component, making it a handy addition to any gunsmithing bench or restoration kit. For best results, pair it with a Birchwood Casey Cleaner-Degreaser prior to application and a quality rust-preventing oil afterwards. Safety note: per the manufacturer's Safety Data Sheet, Perma Blue is classified as a corrosive chemical product that causes severe skin burns and eye damage and is very toxic to aquatic life with long-lasting effects - avoid skin and eye contact, work in a well-ventilated area, and follow all manufacturer safety directions.