Yes. The Gold Standard works great on Diesel Tanks.You will want to use the 3 step system.Instructions can be found here: http://www.kbs-coatings.com/Gold-Standard-Tank-Sealer-Information-Instructions_ep_39-1.html
Instructional Videos can be found here: http://www.kbs-coatings.com/KBS-Videos_ep_90-1.html
Please let us know if you have any other questions.
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