SD Seal-Ox (Black Oxide Stage 4)

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Shipping Weight:
1.00 KGS
Calculated at Checkout
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SD Seal-Ox (Black Oxide Stage 4)


Can be used as the final stage of Black Oxide Process, when used as a dip, but can also be used on Mild Steel, Stainless Steel , Brass, Copper or Aluminium, as a spray or wiped on with a cloth the finish has slight oily finish, which will disappear over a few weeks

SD Seal-OX is a solvent-based rust preventative with excellent de-watering properties.  It is formulated using modern synthetic materials, which provide superior rust preventative properties and produces a very thin oily film. 

Treated components are protected against corrosion for up to 9 months internal storage and up to 3 months outdoor storage.  Further protection can be effected by a further application of  SD Seal-Ox or by periodically using a silicone wax over the treated article. 

SD Seal-OX 
is suitable for use on all metals including Brass, Copper and aluminium and is ideal for porous conversion coatings such as chemical blacking on steels.  It is resistant to contamination and emulsification, SD Seal-Ox is particularly suitable for final stage rust prevention, either after machining or after alkali, acid or solvent cleaning processes.


For optimum results components should be clean and rust free, although machining coolants and lubricating residues should not impair product performance.  When used with the SD Cold-Ox system the component should be thoroughly rinsed prior to immersion in the SD Seal-Ox tank.  Immersion or spray applications are suitable 


SD Seal-Ox should be used cold, ideally in a purpose built tank where the accumulation of water can be drained off or in a polythene container where the accumulation can be seen and the SD Seal-OX decanted off occasionally. Components should be maintained in the solution and not allowed to sit on the bottom of the tank where they might come into contact with contamination.  Components should be left to drain which will take between 45 and 60 minutes for initial drying.


Apply by using our low-pressure non-misting spray or with a brush, work from top to bottom.  Allow the same draining and drying time for dip application.


Shipping information

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 verify 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, Liechenstein, 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