leaking fuel rail

[big h h]

I have a fuel leak coming from the grub screw at the end of the fuel rail, i have used plumbers PTFE tape around the threads on the grub screw, but i am not sure if this will stand up to petrol, if it wont, any ideas.

[Getsis]

Locktite (Red) I have used without any problems. Never thought about thread tape for this situation so not sure it will last.