In a message dated 98-06-17 16:05:32 EDT, you write:

<< I have a project on hand which needs your inputs. I need to bond Silica to
 Silica and Silica to Pd. Each sheet is about 2"x3" and 1mm thick. The
 bonding needs to be water tight. Any suggestions? Thanks,
  >>
Does the bond need to be flexible at all?  If not, you may want to look at
solutions of Sodium Silicate.

These are available with varying Na2O to SiO2 ratios, try low Na2O, to higher
SiO2, and apply thin.  These adhesives do not have much shelf life, but they
are cheep, and the bond is very chemical resistant.

Good luck

Rudy Sedlak

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