I have no way to find out what happened to my car - it was donated a d I asked the charity and they had no answer- before I [owned it and there is no car fax suggesting the rear window was replaced or needed resealing - I can see where aftermarket not professional sealer on glass - what do I need to do to solve problem? Tge car is also weirdly oxidized primarily all over the back of the car which is silver not the front

 

The HAF help/suggestion forum area is for questions about how the website works, not questions about cars. So I'm moving this to General Tech where you'll get more help.