Fuel Leak at Sender

[M & M]

I was wondering if anyone else has had similiar problems.

This is my second gasket that has gone bad after about three months of use.

I have an aluminum tank. The gasket is standard rubber that comes with SW sending unit. I believe the problem is related to the fact that our fuel here is mixed with up to 10% alcohol (corn meal ) that must be reacting with the aluminum and causing the rubber gasket to break down over that three month or so period of time.

Any ideas?

Thanks,
Mike