I seem to remember talk of putting a special insulating grease on spark plug ceramic insulators and the inside of sparkplug caps, to stop them tracking the HT to ground if the caps get a bit contaminated...

Anyone shed any light if this is true, and what the stuff is ??

 

You can get a silicon spray which is non-conductive and forms a kind of seal to prevent water ingress, maybe that, if not bttt for ya.

 

How about vaseline? Would that work?

 

Heat would turn it to liquid mate

 

Good point bit early for me yet