Is there any other environmental issues this assembly faces besides the moisture?(I.E. temperature,vibration, etc....) If there are no other concerns, I would consider an acrylic, possibly Humiseal 1B73 or 1B31. We do have an assembly that is encapsulated with Shin-Etsu KE109E. The customer puts it through a test where it has to work while submerged for a certain amount of time during heavy vibration. It is not a real expensive option, but it is not as cheap as the acrylic option.

Chris Almeras



-----Original Message-----
From: Jorge Santana [mailto:[log in to unmask]]
Sent: Friday, March 29, 2002 12:06 PM
To: [log in to unmask]
Subject: [TN] Underwater application


Hi

   We need found out a way to keep the board working in a underwater
environment, there is possibilities of occasional flood inside the box
enclosure and the board has to survive, the water came from rain.
   Folks from automotive world " under hood applications" have this
experience since cars are subject to flood also.

  What kind of material is used ? What recommended thickness ?

   We are thinking about RTV Elastomeric Conformal Coating.
   It is not necessary to say that the solution should be not expensive and
effective.

Thanks
Jorge Santana

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