Top 10 Best caswell black oxide in 2026

Main highlights

• •Achieve a deep blue/black finish on all iron and non-stainless steels with Presto Black STEEL PC9. Sold as a concentrate, can be mixed 50/50 with water for brush-on applications and 10% in water for immersion. Mix at stronger concentrations for faster blackening or for difficult to blacken surfaces.
• •Creates a rich, vibrant black patina. Ideal for use on a variety of ferrous metals, including steel, iron, and cast iron. Does not blacken Stainless steels
• •Made in the USA: Birchwood is the trusted name used by Architects, Artists and Industry since 1948
• •Artistic techniques allow for customization and unique patterns and designs. Can be applied by immersion, swab-on, or spray methods. Highlighting after will produce a pleasing distressed appearance. Wear appropriate PPE, to avoid irritation to skin, eyes and respiratory system. Gloves and safety glasses are recommended. Respiratory protection may be required if spraying the product produces a mist in work area.
• •Easy-to-use and fast-acting formula. Black color starts developing instantly on clean steel surfaces! Small projects are completed in minutes. Similar to cold blue process.
• •IMPORTANT: Coating itself DOES NOT protect the steel from rusting. If you do not immediately dry and seal it is prone to flash rusting. Seal with appropriate topcoat for end use. The black surface conversion is compatible with all sealants: oil, wax, clear coat, lacquers, etc. Combine with a metal cleaner and rust preventative to make a DIY black oxide kit.
• •Introducing Birchwood Technologies Presto Black STEEL PC9, the ultimate solution for achieving a deep black finish on ferrous materials. This high-quality black patina coating creates a smooth, uniform black finish . It's perfect for use on a variety of ferrous metals, including steel, iron, and cast iron, and is ideal for architectural, industrial, and touch-up applications. Black metal polish.

Main highlights

• •FAST ACTING: Black oxide is a chemical conversion process used to blacken the surface of a part without adding a thick coating
• •EASY TO CONTROL: This high-quality black patina coating creates a smooth, uniform black finish. It's perfect for use on a variety of ferrous metals, including steel, iron, and cast iron, and is ideal for architectural, industrial, and touch-up applications. Black metal polish
• •EASY TO USE: Parts can be blackened in two minutes vs 15 to 30 minutes for hot oxide. Normally, twice the number of parts can be blackened in the same amount of time as with hot oxide. Ideal for high volume or short runs
• •DIY THE COLOR OF YOUR FURNITURE: Artistic techniques allow for customization and unique patterns and designs. Creates a rich, vibrant black patina. Ideal for use on a variety of ferrous metals, including steel, iron, and cast iron. Does not blacken Stainless steels
• •QUALITY AFTER-SALES SERVICE: We promise to provide you with high-quality products. If you have any questions or are not satisfied with the product you received, you can contact us, we will give you a satisfactory answer within 24 hours

Main highlights

• •Easily spot blacken steel (not stainless) or iron. Simply apply the black oxide gel where you want the blackening to occur.
• •Simply apply the black oxide gel where you want the blackening to occur.
• •The gel keeps the blackener in place. Leave it on the part for 1-3 minutes and rinse off. Seal with Caswell Sealer for a dry finish.

Main highlights

Main highlights

• •Blackens Steel & Iron Parts Quickly & Easily (not stainless steel)
• •Room Temperature - No dangerous fumes
• •Contains 1 Pint Of Blackening Concentrate (Makes 1.25 gallons) And 2 Quarts Caswell Sealer (leaves dry finish)
• •Covers approx 75 sq feet
• •Works in 3 minutes or less

Main highlights

Main highlights

• •Removes rust and restores factory finish to Jeep Wrangler Door Bolts
• •Includes Acrylic Sealer to prevent corrosion
• •Works on all steel bolts and nuts. Any vehicle. Any year. Not for Stainless
• •Dip in rust remover, rinse, dip in blackener, dip in sealer. Allow to dry.
• •Includes gloves. Ground shipping to US 48 states only.

Main highlights

Main highlights

• •Professional Results: Used by top firearms manufacturers, this premium gun cleaner delivers deep, cold bluing action to restore worn gun metal—ideal for serious hunters and gunsmithing tool kits.
• •Hunting Essentials: A must-have for all hunting essentials kits, Kleen-Bore Black Magic restores scratched or faded finishes to like-new condition—enhancing performance and preserving your gear.
• •Trusted Gun Cleaning: Designed for precise application, this high-performance gun cleaning solution offers a professional-grade finish, making it an essential part of any gun maintenance routine.
• •Easy to Use: Includes expert instructions and a child-resistant cap for safe, simple application. No heat required—just apply and let the penetrating action do the work for your gunmetal touch-ups.
• •Compact & Powerful: This 2oz (60ml) bottle packs serious power for on-the-go repairs or in-shop use. Whether part of your range bag or workbench, it’s an ideal solution for all gun cleaner needs.