re: 'silvery goo'...
... is something along the line of Anti-Seize, Permatex brand.
Info here!
BTW, my 'red' loctite is in a
pink bottle. Yeah...probably somewhat aged in tint, but pink nonetheless. It is 'high strength'. You will commonly need heat and/or air tools to get fasteners loose/off if you use red loctite. My 'blue' loctite is in a
red bottle. It is 'medium strength.' Fasteners assembled with blue loctite can be taken apart using standard hand tools.
Loctite comes in red packaging, period. Don't confuse it with anything from Permatex.
I wouldn't use red Loctite on anything aluminum (swingarm). Blue will do just fine.
Tighten to torque spec. Check often.