AVR-Chat

What I've come across in many automotive devices is a potting compound that
is almost like kids slime. Looks glossy, but is jelly soft. I suppose it it
allows thermal expansion, and offers a huge physical barrier to dirt, but I
don't know if it's servicable. Most likely not. It's all throw-away today.

Another interesting find is conformal coatings that have been selectively
applied. Looks like it was done with a CNC nozzle.
Not that I've looked for the source of these compounds.

For general use I use Plasticote 70. You can solder 'through' it for
re-work.
http://www.crcind.com.au/catalogue.nsf/Web_Brands/055F762AEDF54A80CA2569AC001973B5?openDocument

Regards
Roland


On 2 October 2010 16:27, Chuck Hackett <egroupscdh@up844.us> wrote:

>
>
> I am looking for a Conformal Coating/Potting Compound that I can coat
> boards with to
> protect them from moisture that can be removed (component-safe solvent?) to
> do
> repairs.
>
> The boards will have SMT, through-hole as well as DB-25, jumper pins,
> headers, etc.
> Obviously I�d protect the DB-25, jumper pins, headers, etc. during the
> coating
> process.
>
> I have found "Techspray 2108-12S" $21 spray can at Mouser that says it can
> be easily
> removed for rework. Is this a cost effective approach?
>
> Spray, brush, or dip would be fine with me.
>
> BTW: I am planning on coating the DB-25, headers, etc. (i.e.: connecting
> pins) with
> a non-conducting grease, etc. to protect them from moisture in the field.
>
> Cheers,
>
> Chuck Hackett
> "Good judgment comes from experience, experience comes from bad judgment"
> 7.5" gauge Union Pacific Northern (4-8-4) 844
> http://www.whitetrout.net/Chuck
>
>  
>


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