Aluminium Blackener Solution

0.50 KGS

Product Overview


 Our Aluminium Blackener is a cold application product, so can be applied at Room Temperature, with no special equipment, Control Procedures, Heating or Ventilation, It can be used as a Spray on product straight on the Aluminium that has been cleaned and prepared, or it can be mixed with 4 Parts Distilled Water, and used as a Submersion or Dipping Product.

The Black finishes are of negligible thickness, therefore they produce no dimensional changes on the finished part. You can produce a variation in colour, from a rich Pewter grey to a deep Black by adjusting dilution rates, and and the amount of time it is rubbed on or submersed, the finished can sealed with With Our Clear or Black Beeswax for an Aged Industrial Look, Caswell Sealer or Clear Coat Lacquers for a more modern look.

It can also be used to Blacken Castings that cannot be Anodised, and can also be used as a touch-up on Black Anodised Parts that have been scratched or Damaged

It is crucial that during application the room temperature is not less than 27°C


It is important to clean the aluminum before any coloring operation.  Ensure that all oils,waxes, flux remnants, mold release agents, and oxides are removed from the metal surface. The best method of cleaning most materials is to use our Aluminium De-Oxidizer & De Smut or Our New Aluminium Cleaner. All Aluminium carries a transparent, natural oxide that must be removed prior to blackening, When the metal is thoroughly clean water will “sheet” or cover the whole surface rather than bead up.  Rinse the metal well and dry thoroughly.  From here on, handle the work only by the edges.  Apply blackening solution within 30 minutes. The solutions made by Caswell are ready to use and formulated to be applied at room temperature. The method of application depends on the size and shape of the work.  

After you have the desired effect, seal the black into the metal, Use Clear or Black Beeswax for an Aged Industrial Look, Caswell Sealer or Clear Coat Lacquers f.

Immersion into the blackening solution. Allow to react until desired finish is achieved. 

Brushing the blackener on using brushes, sponges, wads of cheesecloth, and other improvised tools to dab solution onto the metal.

Spray the blackening solution. Be sure to clean the spray components after use as any metal components will be attacked by the solution. WARNING!! Avoid inhalation of the mist.

If you would like to know more please click on the "Download" Button Below for the full instruction sheet

Below is a short Picture gallery for process when applying by Hand


Please note that our shipping prices are a higher than it would cost to send a normal parcel via the post, the reason for this is because any product that contains chemicals must be sent and packed as per the "hazardous goods" regulations, and be transported by a carrier that is licensed to be able to transport. we are unable to send by regular post as it is now a criminal offence to send undeclared hazardous goods, for postage rates please click on the tab above,


If you are a VAT Registered company in Mainland Europe, when completing the "New Account" form at checkout, as seen below, please enter your European VAT Number, it will then be verified direct with the EU Commission website, and you will not be charged VAT on your order.

(services are subject to the reverse charge and VAT is to be accounted for by the recipient as per Article 196 of Council Directive 2006/112/EC.)

For customers in Bosnia & Herzegovina, Gibraltar, Liechenstein, Norway and Switzerland, the invoice produced will automatically be free of VAT.