Leaking Fuel Level Switch

Not sure if this is the right forum....

My Fuel Level Switch is leaking gas from where the wiring passes through the aluminum base. I have tried a couple products to reseal it unsuccessfully ("Seal All" and a gas tank patch expoxy) They cure hard and then the leak reoccurs after a few runs. Any suggestion?

Problem solved, I gave "Seal All" another chance. Cleaned everything up real well with Simple Green and a toothbrush. Worked in the Seal All with a toothpick and sealed both sides. Leak has stopped and its been holding for a couple weeks.