Things You'll Need
Instructions
Flick on the lighter and torch the screw head with the Loctite applied. If you can't get a lighter or have access to a soldering iron, you can use that to heat the top of the screw as well.
Select a screwdriver whose head matches exactly with the head of the screw. On some applications, there can be a size difference, but for this you need an exact match.
Insert the screwdriver into the screw head, and unscrew the screw. This may still be a difficult process, and you may need to reapply heat a few times in order to get the screw moving.