[dremd]

as far as the back window goes I'd have to reccomend that you buy a new window seal. I hate to tell you to spend money,and silicone will seal it fine unfortunatley if your seal is leaking chances are there is rust under the seal which will only get worse . IMHO pullthe seal out cold half it seal any spots that rusted through paint to match car and put a new seal in which should be cheap. Just my opinion .