I second the Bars Leaks. Its been around since the 40'* and does an excellent job if you use it sparingly. Its also factory installed in some cars to seal assembly leaks.
Once sealed a head gasket permanently in a Chevy Cavalier with this stuff.

Well it was the water pump after all. Through the belt off on the way home one night...lmao. Hopefully i can get started working on it tomorrow. Thanks for all the ideas and suggestions. Greatly appriciated. Cheers