Really?
I have never had a problem with it in a fuel related repair.
Could that be because I use the Loctite brand with real metal in it? (even recommended for cast repairs and high heat applications?)
I have even used it for sealing carb base plugs (you know, the ones that the plugs in the bottom of fuel bowls leak and drain into the engine.) Never a problem or reoccurrence there either.
I have always had issue's with epoxies (the clearish stuff) crystalizing or flaking off around fuel.