My initial impression would be that Loctite is not safe for your wort. Look on the website and see if it is food safe. If it isn't then I wouldn't use it. I had the same problem a few weeks ago and wrapped my fittings with more teflon tape and that worked great, no leaks.
Good luck
Two weeks ago I was on the fence about buying a grain mill. I took SWMBO to the LHBS to look for ingredients when she told me to pull the trigger. When I got it I found out it was on sale too. Love my SWMBO!