I think just because the words "NO LUBE" are printed on the jacket, doesn't mean it's a violation to use lube. If they include literature or a UL listing that prohibits addtional lube, then well maybe. But can you imagine if you did a 500' pull of 500kcmil cables, w/o lube and about halfway it got stuck? Granted, you could try blaming the manufacturer, and try to get your money back somehow. But in the meantime you have a halfway done job that have to finish, which may involve pulling the cables back out, cutting in a box to splice in, whatever, all kinds of time consuming additional work, because you didn't use lube. I'd have to see it myself to be convinced, I wouldn't want to be the guy in charge of a big wire pull that goes wrong because of that new SIM PULL.