The only glow engines I have ever used it on was the OS .46 LA engines. The head is held on with 4 long screws. After three of the LAs head screws backed out during the run in I used the lock tite on them. I pulled each screw and cleaned the screw and threads in the engine with acetone then used a drop of lock tite on the screw threads. Let the engines stand over night before I fired them up. That seemed to do the trick.
Other then those engines and threads I have never used it on any engine, RC engine! I go the other way and still have an 8 ounce bottle of Anti Seize and use a little of it on all the engine screws during a rebuild. For headers that come loose I run the engine until hot then re tighten the locking nut on the header and muffler. I have had headers break but never just come loose.
I do lock tite motor mount screws that go into blind nuts and use fiber lock nuts on most others.
Once upon a time I removed the aluminum threads that got stuck to the steel screws when using lock tite, that's when I started using the anti seize on anything that used steel screws going into aluminum threads.
As an RC engine re builder I run into head screws all the time that are one jump from impossible to remove that lock tite was used on. Removing them is a true thrill.