My 89 si leaks like you wouldn't believe. The seals on the out side of windows lets water pour in. Has anyone had this problem? If so how did you fix it?

 

mine leaks also...but i dont think its the rear hatch seal....mine leaks through some welds in the rear upper part of the hatch...try using "plumbers goop"....put that over some weldes or even on the inside of your seal and put it back on...that should seal out some rain if not all. You can get the goop at home depot or ace hardware..