CovertDye TM Fuel Theft Solutions

CovertDye – Colourless Fuel Marking

Covert Dye can help identify the source of the fuel to ascertain whether it has originated from your stock tank thus enabling you peace of mind that you have got it covered and that you are taking proactive steps to rid yourself of internal theft issues. Once added to the stock tank all the diesel is marked covertly at a ratio of  10,000 :1.  This colourless application is most effective in identifying internal theft by employees who are taking your fuel without authorisation. Once you have obtained a sample of fuel, approximately 50ml, from a suspect  you add 3-5 drops of the supplied reagent, if it is your pre marked fuel you will see this sample change to a strong green colour which will indicate that you have a positive result.

This is proving a most effective tool in the fight against internal fuel theft.

Backed by 12 labs strategically positioned across the United Kingdom. Fuel Theft Solutions are ideally placed to support clients in ascertaining fuel origination.

Fuel Theft Solutions Ltd and Diesel Dye are both based and manufactured in the United Kingdom therefore assuring you peace of mind that the products we supply are made in accordance with British standards and have ISO 9000 quality approval.



  • Vehicles’ not returning acceptable  KPL ?
  • Do you suspect fuel theft ?
  • Suspect someone ?
  • Need to confirm your suspicions ?
  • Need to run a covert operation ?
  • Worried about getting it wrong ?
  • Use Covert Dye !!!

Please note

It is illegal to attempt to impede the identification of a pre marked fuel (rebated) in accordance with the Hydrocarbon Oil Marketing Regulations 2002 14.3

Fuel Theft Solutions Ltd do not support or encourage the use of Covert Dye with rebated fuels.

Diesel Dye Fuel Theft Solutions TM

Providing an overt marking solution in a variety of colours and strengths, DieselDye offers a visual deterrent alongside fuel traceability.

DetectaDye TM DNA Fuel Marking

DetectaDye creates a unique DNA fuel fingerprint. This allows for full traceability and identification. DetectaDye is miscible in all fuels including crude oil.

CovertDye TM Fuel Theft Solutions

CovertDye is an invisible marker, which when tested, will provide an instant verification of fuel ownership.


Consultancy – Providing practical advice on supply chain vulnerabilities.


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