[Leica] Glue

[Kip Babington <cbabing3@swbell.net>]

I am in the process of replacing the polarizing glass in an older model
(13352) polarizing hood.  The original has separated badly, so I'm
taking the glass out of a new non-Leitz polarizing filter to use as a
substitute.  (No filter flames please.)  The original glass had a thin
metal rim which was glued on.  I softened the glue enough to get the
original glass out by just holding it under the hot water faucet for a
few minutes.  Now I'd like to glue the rim to the new glass, but be able
to remove it too (just in case).  I need to attach the rim because the
new glass is too thin for the retaining ring inside the hood to clamp
down on - the metal rim will give the whole assembly the proper
thickness.

What sort of glue is available that would hold on both glass and metal,
but could be undone about as easily as the original?

Thanks for any help.

Cheers,
Kip