[Big-Foot]

445 is a fast curing epoxy. I think I would probably spread a little on a scrap of aluminum foil, let it cure and put it in a glass jar with some fuel in it for a few weeks to see if it softens or disolves.
You may want to contact Braswell to see what they have to say about it.
Loctite makes some fine products - not a doubt in the world - however, I have used JB weld in high temp and fuel contact situations without any issues at all for many years. JB Weld costs a few bucks, I am sure that the Loctite would be substantially more expensive.