On Fri, 8 Jan 1999 19:23:33 +0000, Peter L. Peres wrote:

>  The other way is, to seal the circuit either in conformant sealing
>compound (available as spray I think), or put it in a sealed container
>(can be plastic) pressurized with dry air. Production facilities can do
>this. This is the industrial way.

We conformal coat boards all the time.  Several of our
products go into Chicken/Turkey plants where condensation
is a fact of life.   I would suggest that you use the box
and a heater method as conformal coating is a real
pain-in-the arse.  To get a good solid waterproof coating
the board must be oil free,moisture free, the coating must
be applied correctly, and it can't be too hot or too cold
while drying.

When done right though conformal coating is great.  I have
boards that can run while held under a stream of tap water.

If you are interested in the details of conformal coating
let me know.

If you just want to get a can and see what happens you can
call:

Tech Spray
(806) 372 8523

AC TECH SOUTHEAST
 800-763-7999

We use Conap-1170 from AC Tech Southeast.  I don't remember
if they will sell to the Hobbiest or not.


--
Richard A. Smith                         Bitworks, Inc.
rsmith@bitworks.com               501.521.3908
Sr. Design Engineer        http://www.bitworks.com