Ah, Link-lyfe bubbling away on the stove while mum's out shopping - them were t'days.
I use this stuff applied with a stiff-ish brush .....

"A soft petroleum based paste with a high moly content. Can be rubbed, or burnished on to the surface.
Provides excellent load carrying
Dry film lubrication
Temperature range up to 450ºC"
by a strange quirk we use lots of this at work