My windshield and back glass leak pretty bad. I believe that the they are original, meaning they have never been taken out of the car. They are on a 72 chevelle. I was told that this is caused from the original sealant drying up and cracking. I have also been told that this is caused from rust forming around the windows. Any ideas as to what is causing this? I don't have a lot of cash so what is the best way to get them to quite leaking? I am figuring I can use some sort of waterproof silicon. Is this a good idea?

Thanks!

Don't use silicone ! :eek:
Best fix is to have an auto glass place remove both windows. Chances are there will be a few rust holes in the window channels (lower corners) that will need to be repaired before re-installing and sealing the glass.
Is it a vinyl top car?

It was a vinyl top car, but now it has a hard top. I have not taken off the chrome molding to see if it is rusted or not. I did have a body guy check it out about two years ago and he told me that it was not a body problem. They leak from the top middle. Why can't I use silicon? I said I don't have a lot of money. The local glass shop wants $150 to take out the windows and re-seal them. Any other "cheap" ideas?

Hounds, Please, DO NOT use ANY sealent of any kind if you want to keep this car. Just let it leak until you have the bucks to fix it right.

If you think you have a little rust and leakage now, fill that thing up with silicone. I have been doing this stuff for over 25 years. I have done more window jobs on GM cars than I could even begin to count. One thing I have found is that there is a DIRECT relation between how badly something is rusted to how it was sealed.

First off, you would have to remove the mouldings, I hope you were planning that. Forgive me if I assume you may seal it without removing the mouldings, I have seen that MANY times.

If you look down into that channel the glass sits in you are going to see all kinds of nooks and crannies. Sealent slopped around a little maybe, clips that are rusted,rusted metal, dirt, leaves, all kinds of crud. There is NO way to clean that up without removing the glass. If you tryed to seal that mess without removing the glass you will create MORE of these nooks and crannies to hold water! The water can't evaporate and it rusts MORE.

Just put a towel on the seat and let it leak.
Brian

Thanks for the reply MARTINSR. I don't mean to seem cheap, but I really don't have the cash. I plan on being able to store the car indoors in about another two years. Until then it will have to sit outside. It is getting to the point where mold is growing inside the car! I am going to have to do something or the whole interior will be ruined. Can't the sealant be pilled off at a later date?

NOT SILICONE! I don't know what to tell you. Pull the interior out I guess. DON'T cover it with a cheap tarp either, that will be just as bad. The water gets under it and can't evaporate and you end up with a fungus culture interior.

Honestly, pull the interior, pull the plugs in the floor and let the water run thru it.