Just installed a dryer vent pipe hood through outside wall, which is
stucco.

Caulk was put around the aluminum hood piece that was on the stucco. I
didn't do this myself, so unfortunately I can't give exact details of
caulk except that it was supposed to go on white and then turn clear
after curing and I assume silicone.

The dryer was used less than an hour after this. I noticed that the
caulk on top (which had a good gap between it and stucco) had sorta
"swellled" up so it is now protruding upwards quite a bit (although
still meeting wall and plate). In addition, it stayed white and is
rubbery to the touch, not hard. The sides mostly turned clear, but have
a sticky feel to them. I assume the intense heating of the aluminum
screwed up the caulk so it didn't cure correctly.

What can be done? The problem is that if you try and take off this
caulk it will damage the stucco (unless there is a chemical way to do
it). If the excess on top (which is the part that is cosmetically
unappealing--kinda like someone took a tube of toothpaste and squeezed
it out--is cut down a bit (before getting to stucco), can new caulk be
put on top of the remaining bad caulk? Will caulk stick to caulk
anyway?

Any ideas? I am lost because I have a feeling that the stucco is going
to be damaged and the cure worse than the problem.
--

John Ross