No, I know what you mean (don't glue it on) - but Loctite is a thread friction compound, not a glue (in spite of the fact it is based on chemicals that evolved into superglue a few years ago). It prevents vibration loosening threaded components due to co-rotation, but never "dries" the way a glue does. It has been the mechanic's friend since it was used by Rolls-Royce on the Merlin in WW2. They managed to reduce the overall weight of the engine by reducing the number of locknuts required simply to hold the engine together.

I have sucessfully used it over the years to simply stop things coming loose - an example most recently was to stop the fingers of a clock simply flopping round their drive shafts. The fingers now "grip" properly, but it only takes a little tug along the axis of the shaft (axial) and the fingers come off immediately without (much) effort when the air seal breaks. Clock fingers (and their drive mechanisms) are fragile, don't forget, so Loctite should be suitable to locate and lock the control knob without permenantly fixing it to the shaft - as pointed out by Hugo or Rob a while back, this would then create the risk of the entire control ripping off the PCB and snapping the extractor/filler neck of the display panel when you tried to remove the (glued) knob.

One of the few remaining Mk1 owners... #00015