Howdy Fred
I've just done a few searches on this topic myself recently and I went with Loctite 406 - that's what the guys on here have recommended in the past. I can tell you that I now agree with their recommendations! Gives you a little bit of time before you
commit and you don't need much either.
A little tip - if you can't find it on the shelves at your local auto-related shop ask the staff of they have it. Motor Traders / Coventry Fasteners (where I got it from) keep it in a fridge out the back!
Kathi