Black Oxide & Parkerizing Chemicals

Du-Lite has a Great Line of Specialized Chemicals for Blackening and Parkerizing Various Types of Metals. All Du-Lite’s Chemicals are Made in the USA and are Designed to Work Seamlessly with Our Gunsmith Setups and Easy Black Plus Systems which are Designed and Manufactured in Our Shop in Middletown, CT.

If Our Easy Black Systems Don’t Fit Your Needs, We Can Custom Design, Build and Install a Metal Finishing System to Your Exact Requirements as We Have Done at Major Firearm Manufacturers and Military Bases.


Since 1939, Du-Lite has been a Leading Supplier of Black Oxide Finishing Equipment, Chemicals, and Accessory Products to American and Foreign Manufacturers. Whether You are a Hobbyist or a Large Manufacturer, Du-Lite’s Black Oxide Chemicals are the Perfect Solution and are Available to Order Online in Sizes of 25 lbs. up to 500 lbs.

Du-Lite Oxiblak, Black Oxide Blackening Compound for blackening cold rolled and regular steel.

Du-Lite Steelkote, Black Oxide Blackening Compound for blackening cold rolled and regular steel in Electrically Heated Black Oxide Systems.

Du-Lite XX Compound, Black Oxide Salts are used for blackening silver soldered areas after regular black oxide treatment.

Du-Lite 3-0, Black Oxide Salts for blackening 300 and 400 series stainless steel, Post ’64M94 Winchester receivers, malleable and cast iron.

Du-Lite MP-330 Manganese Phosphate Liquid is used to produce a black World War II “Parkerized” finish on the steel and iron parts of military equipment like M1 Garand, Colt 1911, M 1 carbine and WWII machine gun mounts. MP- 330 produces a dark black color on finished work and may have fine, medium or coarse crystals depending on the pretreatment used.

Du-Lite ZP-440 Zinc Phosphate Liquid Concentrate is used to produce a light gray zinc phosphate finish on steel parts.


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    Du-Lite ZP-440 Zinc Phosphate Liquid Concentrate

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    $295.00$1,207.25
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    Du-Lite XX Compound

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    $237.50$1,650.00
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    Du-Lite Steelkote Black Oxide Salts

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    $237.50$1,200.00
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    Du-Lite Oxiblak Black Oxide Salts

    0 out of 5
    $237.50$1,200.00
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    Du-Lite MP-330 Manganese Phosphate Liquid

    0 out of 5
    $295.00$1,207.25
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    Du-Lite 3-0 Salts

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    $237.50$1,650.00