I have a cracked neck on my gas tank.

What is your question?

I cannot pass inspection due to a cracked neck on my gas tank. The check engine light was reset to off. I was told to drive the car another 100 miles and to bring it back in. The check engine light was off, but I failed inspection again. The car has 95,000 miles on it and I want to sell it versus putting out $1000 to replace the tank. Any recommendation is appreciated. Is their anything that I can add to the gas tank which would seal the leak and allow me to pass inspection?