Birchwood Casey Presto Blue Magnum Gun Bluing Solution 3oz

The Birchwood Casey Presto Blue Magnum delivers professional-grade cold gun bluing in a concentrated formula that restores and protects metal surfaces. This 3-ounce bottle provides enough solution for multiple firearms, creating a deep, uniform blue-black finish that rivals hot bluing processes.

What Makes This Different

Presto Blue Magnum uses an advanced selenium dioxide formula that penetrates deeper than standard cold blues, producing a more durable finish with superior corrosion resistance. The concentrated solution works at room temperature without heating requirements, making it safer and more convenient than traditional hot tank bluing. Results appear within minutes and continue to darken over 24 hours for maximum depth.

Key Features

• Selenium dioxide formula creates deep, long-lasting blue-black finish
• 3-ounce concentrated bottle treats multiple firearms and parts
• Room temperature application requires no heating equipment
• Works on carbon steel, alloy steel, and cast iron surfaces
• Provides corrosion protection while restoring original appearance
• Fast-acting formula shows results in 2-5 minutes
• Compatible with degreasing and polishing compounds

This cold bluing solution excels in restoration projects where original finishes have worn away from handling, holster wear, or environmental exposure. Gunsmiths rely on Presto Blue Magnum for touch-up work on vintage firearms, while shooters use it to maintain the appearance of frequently-used guns. The formula bonds chemically with the metal surface rather than simply coating it, ensuring the finish won't chip or flake under normal use.

Technical Specs

• Volume: 3 fluid ounces (89ml)
• Active ingredient: Selenium dioxide solution
• Application temperature: Room temperature (65-75°F optimal)
• Coverage: Approximately 15-20 square feet per bottle
• Working time: 2-5 minutes initial, 24 hours full cure
• Compatible metals: Carbon steel, alloy steel, cast iron
• Shelf life: 3 years unopened, 1 year after opening
• Made in USA

Birchwood Casey's reputation for quality metal finishing products makes this the trusted choice for professional and amateur gunsmiths alike. The concentrated formula delivers consistent results across different steel types and surface conditions.