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