No need. If you solder the leads properly from under the board, then you can tension the leads strong enough so the cap rests securely on top of the precisely cut Soundcoat pads. This is all you need.
If you don’t want to do that, then hot glue always works and comes off fairly easily without damaging the board should you need to remove the cap. I don’t like using any kind of goop for this sort of thing, but that’s me.
You could also use double sided tape pads in place of the Soundcoat material.
If you don’t want to do that, then hot glue always works and comes off fairly easily without damaging the board should you need to remove the cap. I don’t like using any kind of goop for this sort of thing, but that’s me.
You could also use double sided tape pads in place of the Soundcoat material.