As an old picture framer I have to ask.......Why not build the frames first,
then glue the mirror to the frame.

Just a thought. then the glue won't come into contact with the silvering.
Doug
"Don Mosley" wrote in message
...

Which glue would be best for this outdoors?
Plenty will stick it but I'm worried on cheap mirror it will eat the
silvering
off the back.
This is mirror tile on cinder block then I'm putting old wood window
frames on
top. Spruce the wall up a bit. With trees in front it looks pretty cool.

Don