Fuel Tank Sealer for 'Bulk Head Mount' Switch

[Tex]

I am going to change over the float switch in my Drifter belly tank, it is a just hole in the side of the tank through which the threaded end protrudes to put the nylon nut on. On the inside there is a rubber washer which seals via pressure from tightening the nut.

 

I am contemplating putting something on the outside to help ensure a seal from fuel leaking around where the thread protrudes.

 

What product should I use?

 

I have some Stag Joining Paste which was recommended to me... any other suggestions?

 

Cheers

 

 

[Pilot Pete]

Loctite 505

 

 

[Tex]