checking spark F115TLRC

[99yam40]

copper and aluminum do not get along.
the holes the plugs screw into are aluminum
smearing copper compound on the plugs is a no no
when screwed into the alum holes

nickel based would be OK

[throrope]

never use any thing that contains copper on aluminum threads

Good point. Here's some stuff specific for spark plugs.
Spark Plug Thread Lubricant - Champion Aerospace

[dray0151]

The anti seize stuff I use is not metallic based so no copper or graphfite.

Metal Free 2000