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No shrink, I don't know anything about this rubber but it take my attention lol.I don't have a sheet of MX-P handy at the moment, but I used to play with it when it just came out. One thing I can definitely remember is the quite noticeable shrinkage of MX-P once the booster airs out. Whereas after a month of use and a couple of re-gluings, Hype Kr has not shrunk at all.