The sharp bump at the base is actually intended.
Provides a bit of stand off, such that there will be (has to be) a thickish
layer of glue. A thin layer of glue cannot handle the stress due to
expansion differences between mirror base and window as temperature swings.
A thick layer can.

Theo



"BobS" wrote in message
...
Charlie,

Having had to do this several times - I found out what was causing it on
mine at least. Obviously the high temp of the two dissimilar materials -
glass and metal but the main reason was that the mirror base was not flat
and even had a small, sharp bump in the casting. I did the Scary Harp
routine on it, cleaned the glass and base with alcohol then applied some
standard CA (super glue) and that mirror hasn't budged. The car is in Fla
now with my mother-in-law and its still attached. So look at the base
closely.

Bob S.


"Charlie Self" wrote in message
oups.com...

George wrote:
"JoeTaxpayer" wrote in message
...
I had a small can of shellac (half pint) with a press on (not screw-on)
lid, sitting on a basement shelf. Today I noticed a wet floor, though
the
toilet leaked.
They saw the can on its side, the bottom buckled as if pressure built
up
inside, finnally exploding the can open, and pouring itself on my
floor.

WTF?? Is this 'normal'? Anything else down there ready to explode?


Anything else with relatively high vapor pressure that you put away cold
and
allow to heat up. That's one reason for screw-on lids.

Never left a bit of cold soda in the bottom of the bottle and closed the
windows on the pickup?

Don't open it near anything you care for.

Yeah, well...I just went out to my little pick-up and found the damned
rear view mirror (with two overly heavy map lights) hanging by its
wires.

This heat is a real joy. We go years barely seeing 90, and this year, I
think we've had at least 10 days well into the 90s, most of them mid or
high. Pfui.

I'll have to drive the dangler into town, get glue, scrape and clean
and reinstall.