Originally Posted by
vlad_vy
Clean the shock shaft and the button head screw and apply blue loctite to the threads. Before continue let locktite cure (use on the next day).
There are two versions of "Blue" loctite that come in the strength you want. One is 242 (most common) the other is 243 (oil resistant). Yes, 243 is the version you want for shocks. You still need to clean the shock shaft and screw with alcohol or motor cleaner before applying the loctite.
If you are going to be switching pistons a lot it might be worth buying a second set of shock shafts and having your alternate pistons already setup and glued.