Stainless Steel Blackener

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Shipping Weight:
0.50 KGS
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Stainless Steel Blackener


There is no limit to the size of the item that can be blackened, from small items such as watches, engineering parts etc, through to complete kitchens, Restaurants, Staircases. most colour
variations can be achieved including artistic effects


Stainless Steel Blackener 370 is an acidic liquid concentrate used full strength or diluted with up to 3 parts water to blacken stainless steel at room temperature. its Produces a pleasing dark gray/black finish, but by reducing or increasing the amount of water added you can create a variation of shades from light Grey to a Dark Black.

For an even finish on smaller items it is always best to submerse your item once the Blackening solution has been mixed, and your item prepared, that way the solution will have even coverage for an even amount of time, and the finished product will be uniformed in its finish

If you have a large item, a structure that is already fitted, or you need to repair a damaged area, that has previously been blackened, then dipping is not possible or financially viable. you can apply our Stainless Steel Blackener by Hand using a Sponge, Brush, or a cloth, the mixing rate still applies as above and again increase or decrease the dilution to get the effect that you need.

If you want to create a uneven modern design pattern, then we suggest you experiment using cut offs of Stainless Steel that are the same grade as the item you want to Blacken, and by using different types of products such as the variants of thinners when you prepare the metal, let them dry on instead of wiping off, and when you apply the Blackener you will get effects similar to the images on the left.

The product can be used on items for indoor and outdoor use, generally if it is to used for indoors there is no need to seal the surface once completed, unless it is a surface that is going to have heavy usage such as a Bar or a doors

It is crucial that during application the room temperature is no less than 27°C, at colder temperatures, it will not work


There are a number of ways to seal Stainless Steel Blackener, firstly a slightly oily finish can be achieved on engineering parts by using our SD-Seal Ox, For larger flat areas we have found that beeswax works very well, we have seen beeswax used on large outdoor areas, and it works well.

It is possible to spray a Lacquer on the finished surface, this will seal it, but it some cases were thickness of the metal is crucial, it will increase the thickness, one of the key points with Stainless Steel Blackener is that it is not a paint, it stains the metal surface, so there is no increase in the thickness of the metal. Finally you can use Caswell Sealer, this can be diluted and applied by hand or even used by submersion for items that have been Blackened using the same technique.


If you are working on items that have shapes and indents, or you are working on the underside of an item such as a statue, you can buy the Stainless Steel Blackener in a Gel form, this will stick better to areas were liquids may run of.  The product is identical, there is no dilution, it ready to use, you can see this product by clicking here>>


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.


Sales to European Countries outside of the UK will be charged VAT, if you are VAT registered in a European country, please send us your VAT Number, Verification of VAT numbers must now be carried out manually via the EU Commission VIES Validation website, once we have your VAT number we can then get validation and can  either credit back the VAT or issue an invoice free of VAT. We are unable to very your VAT at our checkout process, as the EU Website does not allow third party integrations from external websites

For customers in Bosnia & Herzegovina, Gibraltar, Liechtenstein, Norway and Switzerland, the invoice produced will be free of VAT, but there is a charge of £21.75 for import clearance, Please complete our contact page form, or email us on, alternatively you can call us on +44 1252 560515


3 Reviews
  • 5
    Works Great on Optical Components

    Posted by Alan on 5th Sep 2017

    We had some subminiature optical components laser cut from this stainless steel. They needed to be anti-reflective. Paint couldn't be used because when magnified the particles of paint were visible. The Stainless Steel Blackener gave us a perfect matt finish - very dark grey and without any visible residue.

  • 4
    Black in 2nds

    Posted by James on 8th Jun 2015

    Very impressed with how quickly the solution blackens stainless steel

  • 5
    one of the best I've tried

    Posted by Ian Cannon on 13th Mar 2015

    as with all patinating products preparation is everything, but I was very impressed with the final finish, an even dark smoky black, client was equally impressed