In attempts to find a leak I've spent ages running water on various parts of my wife's car. I'm now fairly certain that the problem is a short vertical seam, running from a roof slot to the hatchback opening. It seems to be a simple overlap with a couple of spot welds - the question is how to seal it. Is there any body mastic that will wick into a thin gap and then set? What do the body shops do?
snipped-for-privacy@aolbin.com brought next idea :
Capt Tolley's creeping crack cure might be a way forward, it wicks itself into a narrow gap.
In message , Harry Bloomfield writes
My Focus Mk1 boot is leaking at both sides. Of course, the tail lights are the usual suspects - but tests seem to indicate that they may not be. I've got duct tape over all the possible areas of ingress - plus over where the rear quarterlights meet the body. I'm now working on the bottom (where the rear bumper meets the body).
However, I had my eye on this sealer in case I need it (but haven't got any yet):
Thanks, from a quick look that seems worth a try
I've had a hell of a job finding the problem. I used plumbers mastic to blank off different areas and build barriers - starting at the bottom with a hosepipe and working up as each area could be ruled out.
Just had a look at your link - it's silicone!!!! Don't use silicone if you might want to paint afterwards.
I shouldn't think I will be - but advice noted,
There are pukka car seam sealers that can be painted over - which I doubt you could do with a mastic.
Hmm the problem then sounds like faulty manufacture. Trouble is that rust has probably already started and with expansion and contraction and vibration its going to be a big problem to keep it sealed. Is the car very old? These things used to happen a lot many years ago but modern cars joints are a lot better.
Brian
seam sealer did it to my Dacia Duster .......
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