Been using a simular product since the 70's , now called TriFlow:
(Used to be called "Triflon" oil)
They seem to have a few other products now, the company is now owned by Krylon , (the spray paint company). Seems like back in the 70's Everyone was using the stuff to lube their chains.
I think I got a small bottle of the stuff when I bought my Kimber .45 . I would guess the Dupont stuff is simular, excellent stuff.