Birchwood Casey Super Blue Liquid Gun Blue - Double Strength

In this review the Birchwood Casey Super Blue Liquid Gun Blue is evaluated as a home gunsmithing and maintenance product for owners who want a quick, professional-looking touch up. It stands out for a clear reason: the double-strength liquid produces an even, deep blue-black finish on cleaned steel parts, making it useful for routine bluing and spot repairs. The 32-ounce bottle is sized for repeated use, and the formula works best when applied to non-stainless highly polished steel to restore or refresh finish.

Key Features

• Double-strength formula: Provides a deeper, longer-lasting cold bluing finish than standard liquids for visible protection on exposed steel.
• Large 32-ounce bottle: Supplies plenty of liquid for multiple projects or repeated touch-ups without frequent repurchase.
• Versatile application: Works well on polished steel and parts with nickel or chrome alloys for a consistent, polished appearance.
• Fast-acting solution: Delivers quick color development on properly cleaned metal so users see results without long wait times.
• Trusted maker: From a brand used by shooters and gunsmiths since 1948, designed for routine care and field touch-ups.

Who It's For

This product is aimed at recreational shooters, collectors, and home gunsmiths who perform routine maintenance and cosmetic touch-ups on non-stainless steel firearms. It suits anyone needing a large supply for multiple guns or a workshop bottle for periodic rebluing and small repairs.

Those who should look elsewhere include owners of stainless steel firearms or people expecting a hard, heat-treated factory finish; the liquid is a cold bluing agent best for cosmetic restoration and spot repairs rather than full professional refinishing that requires heat or rebluing ovens.

Pros & Cons

Pros

• Produces an even, deep blue-black finish on steel when the metal is well prepped and clean.
• Large volume offers clear value and longevity for multiple projects or workshop use.
• Simple application for touch-ups with small tools like Q-Tips or swabs and quick visible results.

Cons

• Not suitable for stainless steel, and durability can vary; some users report limited rust resistance without proper sealing.

Specifications

Our Verdict

For shooters and hobby gunsmiths who need a reliable, large-volume cold bluing liquid, this double-strength solution delivers visible, attractive results and good value for routine maintenance and touch-ups. It is not a substitute for professional heat bluing and requires careful preparation and sealing to maximize corrosion resistance, but for restoring the look of non-stainless steel parts it is a practical choice.

Frequently Asked Questions

Can this be used on stainless steel?
No. The product is intended for polished steel and parts with nickel or chrome alloys and will not blue stainless steel.

How long does the finish last?
Finish longevity varies with prep and protection; properly cleaned and sealed parts hold color longer, though some users report variable durability.

Is the 32-ounce bottle enough for multiple guns?
Yes. The large bottle is sized to last through multiple touch-ups and routine maintenance jobs.