About Us

Du-Lite Corporation is

Since 1939, Du-Lite has been a leading supplier of black oxide finishing equipment, chemicals, and accessory products to American and foreign manufacturers.


Du-Lite Corporation

Since 1939, Du-Lite has been a leading supplier of black oxide finishing equipment, chemicals, and accessory products to American and foreign manufacturers.

Du-Lite® is the world leading supplier of Black Oxide (Bluing Chemicals), Manganese Phosphate (Parkerizing Solution), Kwikseal® Firearm Lubricant and Rust Preventative Oil. No one sells more chemicals, equipment or firearm rust preventative oils to the firearm manufacturers and dealers than Du-Lite®.

Kwikseal® is used by most major firearm manufacturers to protect their firearms while in storage and during shipments to their dealers. The list of manufacturers include; Ruger, T/C, KEL-TEC, Kimber, STI, Les Baer, Caspian Arms, U.S. Fire Arms Mfg. Co. and Ed Brown among others. Over 3,000 satisfied customers worldwide! Call us today and we will solve your metal finishing problems.

Du-Lite®’s chemical processes were originally developed to replace highly poisonous cyanide methods of black oxide, Du-Lite®’s black oxide process called Oxiblak™ does not contain cyanide, mercury or heavy metals which are detrimental to the environment and a health hazard for the operator.

An important part of our success has been the technical support we provide to our customers. We maintain a complete lab facility to assist customers in solving their most difficult black oxide problems. Our technicians are available to answer questions from the field and we also maintain our own black oxide production facility which is used to test sample parts. This allows proper recommendations of equipment and chemicals to prospective users.

Du-Lite®’s manufactures black oxide chemicals for steel, stainless steel, cast iron, silver solder, copper and brass as well as the metal finishing equipment specially engineered for our products.