[Spits] new tank - to sealant or not to sealant?

[s1500]

I got the fuel tank from Vicky Brit today. She's a beaut. I even got an 
extra locking ring & gasket. Didn't know they came with one already.

Also got a new fuel float, and this one is a preferred brass float. 
Different model than the one I have. You can see the rheostat, and it 
has wire connections.

Anyways, before I embark on testing. Should I use some sort of gas-safe
sealant when putting the fuel meter back together? I'll be very careful 
when putting it all back together(trying not to bend things), but will 
sealant be preferred as well?