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'OT pcb coating'
1999\10\16@235239 by GPES

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1999\10\17@111546 by Reginald Neale

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>Hello All.
>I just wonder if anybody knows about PCBs coating
>to prevent moisture damage.
>I prefer soft silicone  the type I can submerge
>complete board in to and let access to  drip off.
>And after it cures it wil stay as soft as possible.
>Thank You    for any links and part numbers .
>   Ivo
>

 Dow Chemical makes silicone conformal coating. Normally, the
 coating is applied only a few mils thick, so "soft" is not a
 relevant term. It's flexible, if that's what you mean, and if
 it's cured in bulk, it's sort of rubbery. Contact info is at

 http://www.dow.com/assistance/infocenter.html

 Reg Neale

1999\10\18@154640 by Richard A. Smith

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>I just wonder if anybody knows about PCBs coating
>to prevent moisture damage.
>I prefer soft silicone  the type I can submerge
>complete board in to and let access to  drip off.
>And after it cures it wil stay as soft as possible.

We have used a conformal coat for a couple of projects that went into
Chicken & turkey processing plants.  When applied properly it works
quite well and a bath of Acetone will remove it.

Its called Conap CE-1170 and comes as either a 2 part mix or premixed
in spray cans   We buy it from a company calld  AC TECH SOUTHEAST
ph#800-763-7999

The trick is applying it correctly.  You board must be squeaky clean,
free from oil and dust. Drying must be in a reasonably controlled
enviroment as well.

Call CONAP 800-836-3666 and discuss your requirements and I am sure
they can help.  The data sheet on the product explains all the
requirements for a good coating. They mean it too.  If you don't
follow the instructions closely water WILL get under the coating.


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


'OT pcb coating'
2000\02\09@152052 by Larry G. Nelson Sr.
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I have also used Plastidip like what they sell for coating the handles of
your tools.


At 11:14 AM 10/17/99 -0400, you wrote:
{Quote hidden}

Larry G. Nelson Sr.
.....L.NelsonKILLspamspam@spam@ieee.org
http://www.ultranet.com/~nr

2000\02\09@152706 by Peter Keller

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What are you doing if there are any switches, plugs and other not sealed
parts on the board ?
Peter

"Larry G. Nelson Sr." schrieb:

{Quote hidden}

2000\02\09@160108 by Larry G. Nelson Sr.

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For this product it all needs to be sealed. You can mask areas to be left
exposed and brush the material on to get missed locations.


At 09:28 PM 2/9/00 +0100, you wrote:
{Quote hidden}

Larry G. Nelson Sr.
EraseMEL.Nelsonspam_OUTspamTakeThisOuTieee.org
http://www.ultranet.com/~nr

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