I'm going to hoard some, and hereby resolve to not do in the future what I've done on my Clem and our HHH (mount them with too much glue to allow them to ever be removed without destruction). In the future I pledge to always mount them in a way that they're removable without destruction.
Rubber grips are ever so slightly too small for the bars, and the hairspray or alcohol let's you shove them on there, then it evaporates and you're left with a pliable material tightly hugging the bar. Cork is hard and has to be the exact diameter or slightly larger to get over the bar, then it just spind away if there's no glue or some sort of make-the-bar-bigger source underneath it. Someone else may be able to better explain the differences, I'm just going on how it feels to work with.