It was more of an application comment vs. a prohibition one.
I see now that there is a potential problem as far as getting it on properly, and wholeheartedly agree with Longassname that having the grease slopping out of the coil could certainly cause a problem.
I use this product sparingly in a little tube and am pretty careful in applying it, so I've never experienced any arcing problem. My boots & coils and the plugs have come off with no problems so far. I think it really also has to do with how hot your engine & transmission gets over the long run. In as mild a climate as Oregon none of my vehicles ever really show any signs of over-heating, but I know that I'm pretty anal about maintenance.
