Sprocket nut...

[fazersharp]

Interesting, I'd never heard of Green Loctite.

According to this page Green Loctite isn't as strong and doesn't have as high a temeperature range as Red Loctite, but it's low viscosity, so it can be used on a part that's already secured without needing to undo it, like Plusgas it seeps into the thread.

Apparently it can also be removed with heat like Red Loctite, so you should be ok getting it off in the future.

I wouldn't give much creadance from a site that spams its info text with the 2 keywords so that google finds it.
try this
https://youtu.be/qcknFHcTIeo