Gas tank leak

Bending the ears up is the thing to do. However, I recommend removing the tank to do it. I just got done with Bruce's ex's dart. I say remove it because, since the sender is located on the side of the tank, it's very easy for the gasket to slip out of place. With the tank removed, you can stand it on the back side with the sender hole straight up and get the gasked positioned correctly and see what you're doing. It's very easy to remove and install the tank. I wouldn't use any kinda sealant.