Birchwood Casey Perma Blue Gun Blue Liquid, 3 oz. (brand part no. BIR13125) is the brand’s flagship cold-bluing solution for touching up nicks, scratches, and holster wear on carbon-steel firearms. Birchwood Casey formulates Perma Blue to penetrate steel and produce a durable blue-black finish that resists rubbing off, giving gunsmiths and hobbyists a fast alternative to a full hot-bluing job. It’s a staple for anyone maintaining an older firearm’s finish or touching up new wear between range trips.

Key Specifications

• Produces a durable blue-black finish that penetrates steel rather than sitting on the surface.
• Formulated for touching up nicks and scratches rather than full refinishing jobs.
• Product category is chemicals, part of the Perma Blue line.
• Packaged as a 3 oz. bottle, measuring 7.35 inches in length.

Frequently Asked Questions

Will the finish rub off over time? No — Perma Blue is formulated to penetrate the steel and give a durable finish that resists rubbing off.

Is this suited to full refinishing or spot touch-up? It’s built for spot touch-up work on nicks and scratches rather than a complete refinish job.

Buy Birchwood Casey Perma Blue Gun Blue Liquid

Touch up worn bluing fast with Perma Blue from Birchwood Casey. Order direct from our Lubbock, Texas gun shop and browse our full gunsmithing tools and supplies lineup.