Im not sure what type of metal im using it on. It is non magnetic. Will this black oxide harm the metal in any way or will it just not have an affect?

If it’s non magnetic, then this will not work. Whether it would harm the metal is dependent on what sort of metal it is.

Will this work on a steel putter head?

Yes, as long as it is carbon steel. If you don’t like the final finish, it is as easy as sanding the putter back to its original state. I hope this helps.

Once sealed, can the oil be removed to avoid atracking dust? Looking for something to restore typewriter linkages, and they must be assembled "dry".

This product is just the blackener. The sealer is not included. If you want a dry finish, seal it with our "Caswell Sealer" as opposed to the oily penetrating sealer.

Will this work on Aluminum Alloy ?

This will not work for aluminum. There is another product that you can order online that will darken aluminum. I do not remember the name specifically.

Caswell Black Oxide Concentrate 1 Qt

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

⚙️ Transform your steel with precision black oxide magic!

PRO LEVEL PROTECTION - Pair with Caswell Sealer for a durable, corrosion-resistant finish
SEAMLESS INTEGRATION - Perfect for iron and steel parts—just add distilled water and go
ECONOMICAL POWERHOUSE - 1 quart concentrate yields 2.5 gallons of ready-to-use solution
SPEED MEETS PRECISION - Achieve deep, uniform black oxide finish in as little as 30 seconds
MAXIMIZE YOUR METALS MOJO - Covers up to 1200 sq.ft. per gallon for industrial-scale projects

Caswell Black Oxide Concentrate is a professional-grade liquid solution designed to blacken iron and steel parts efficiently. One quart of concentrate mixes with distilled water to create 2.5 gallons of blackening solution, covering up to 1200 sq.ft. per gallon. The process takes between 30 seconds and 10 minutes at room temperature, delivering a uniform, corrosion-resistant finish when sealed properly. Ideal for industrial and DIY applications, this product is a must-have for enhancing metal aesthetics and durability.

Specifications

ASIN	B09MR7SK8L
ASIN	B09MR7SK8L
Brand Name	Caswell
Customer Reviews	4.4 4.4 out of 5 stars (52)
Customer reviews	4.4 4.4 out of 5 stars (52)
Item Form	Liquid
Item Weight	1.09 kg
Item Weight	1.09 kg
Manufacturer	Caswell
Manufacturer	Caswell
Manufacturer reference	BOCONC1Q
Unit Count	32.0 Milliliters

Reviews

L**N

As long as your steel is clean this will do wonders for your surface finish!

5.12.2025

C**U

Worked great when used as directed.

12.09.2025

K**H

Works really fast when fresh - 30seconds. It's a 1:9 mix. One part blackening, 9 parts distilled water. As "stuff/contaminants" drop out of solution it may take 3 or 4 minutes. Filtering helps (400 sieve). A "splash" of blackening helps, but the solution is getting old.

29.06.2024

J**H

works well

30.06.2025

M**K

Blackner works as expected

30.04.2025

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