If it was the normal silicone sealant then the by-product given off
during curing it acetic acid. Personally I would not think the
concentration would be that high but maybe the acid got concentrated
in some water droplets.
BTW you can get a different silicone sealant which does not release
acetic acid when it cures. I cannot remember what they call it but it
is used in the electronics industry where corrosion may be a problem.
-- Brett Lymn, Computer Systems Administrator, AWA Defence Industries
===============================================================================
"Aha! Pronoun problems. It's not `shoot you, shoot you', it's `shoot
me,
shoot me'. So, go ahead, shoot ME, shoot ME <BLAM>... You're
Despicable"
-- Daffy Duck