filler tube

Hello Everybody, Yesterday I was dropping my fuel tank to replace the pump and as I was pulling the filler neck out of the tank, the small plastic check valve burst into several pieces. I've read that this is built in to the neck itself and the only remedy is a new neck. These are fairly...

Question about my 1991 Mustang 5.0 LX I've got rotten seals on the opening of the filler tube and the tank is leaking, too, probably where the tube enters the tank. Have any of you ever used those spray-on sealers like they advertise on TV to repair (at least temporarily) this kind of problem...