"axolotl" wrote in message
...
On 2/16/2010 12:38 AM, Don Foreman wrote:
Doesn't stress elex by shrinking because it doesn't
cure brittle-hard like epoxy, it retains a bit of give.

Don has brought up something the OP may not be considering. If one whips
up one's own witch's brew of a potting compound, the desired
electrical/mechanical characteristics may not be there. As an example, the
device the OP posted bears a superficial resemblance to a microphone. If
you were trying to pot the high impedance buffer of a capacitor
microphone, the results may be disappointing. A board is generally pretty
difficult to unpot.

Kevin Gallimore

Thanks Kevin, luckily conductivity of the epoxy isn't a major issue (well it
is if its toooo low but its not critical). Water absorption is however
important, the LC177 isnt too bad at this at 0.3% w/w.