This was a specialised poly tape with a new generation adhesive. It is ideally applied to new spring leaves, otherwise you have to remove all signs of rust and scale from the leaves before application of the tape and before the spring pack is assembled.
It would probably work the same a lubricated leaves but not attract grit which act as an abrasive to the springs.
I have a friend with an SIII diesel trayback who suspends the vehicle on is hoist with the axles dangling in mid air, he then sprays old sump oil from his Mack into the leaves with a kero gun then cleans everything up. The vehicle rides like its new. He also had a Defender trayback that never gets driven because he prefers the SIII. Go figure.
Diana
Try Poly-slide which is a non adhesive type, still looking for the one in question.

