Aluminum Blackening

Black Oxide Coating & Finishing for Aluminum

Insta-Blak A-380 is a room temperature immersion finish for aluminum surfaces. Alkaline liquid concentrate used at 25% to 40% by volume in water. Immersion times of 30 seconds to 2 minutes. It is recommended for blackening aluminum objects not requiring a high degree of abrasion resistance such as heat sinks, etc. It is not as hard as a black anodized finish. The hardness of the finish can be enhanced by top coating with a clear lacquer such as EPi’s E-Tec 520.

Insta-Blak A-384 is an acidic liquid concentrate used full strength that is applied by swab-on techniques for blackening engravings, etchings, prototype parts or for the quick touchup of scratched or re-machined black anodized surfaces.

Blackening results are uniform, consistent, repeatable, stable under lacquer, and colorfast through age or sunlight.

Does your black anodized aluminum have scratches? Our Insta-Blak A-384 can be used to touch-up black anodized surfaces. It conforms to AMS 2483B for touch up of aluminum. Insta-Blak A-384 cannot replace hard anodized finishes where a high degree of abrasion resistance is required.

Insta-Blak A-385 is an immersion or swab-on finish at room temperature for aluminum surfaces. Mild acidic liquid concentrate used full strength for swab-on black oxide finishing and touchup finishing or diluted with 4 parts water for immersion finishing. Frequently used to produce an imitation pewter finish on aluminum surfaces.