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Hi Guys,

yes, i drlled through my roof by accident. i was refitting my roof pannels and drilled through the wrong spot. It's only 5mm or so, so i'm going to leave it in.

what can i use to waterproof the top? do i need to?

thanks - nick
 

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My T4 had quite a big hole in the roof from a phone car kit aerial. I used a rubber grommet and some clear silicon, just silicon should be fine for yours.
I have had the van 7 years now with no leaks.T:
 

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silicon contains salt and can contribute to rusting.

I would use a non-silicone sealant, or a tightly fitting grommet and a panel adhesive suck as sikaflex

T:
 
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