Re: Silicone Sealants in Electrical Applications (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Thu, 3 Feb 2005 21:07:49 -0800
From: Scott Hanson <huil888@xxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: Silicone Sealants in Electrical Applications (fwd)

Matthew:

Almost all of the commonly available "silicone sealants" utilize a cure
chemistry that releases acetic acid vapor during the curing cycle that is
initiated by exposure to moisture in the air. This is why these materials
smell like vinegar as they cure. These materials are totally unsuitable for
any electronic use (potting, sealing conductors or enclosures, etc) and
should not be used in contact with any electrical circuitry.

General Electric makes a special line of Electronic Grade RTV silicones
(RTV160, RTV162, RTV167) that utilize a cure chemistry that releases alcohol
vapor during curing. These materials can be used for potting and sealing
bare conductors and other electronic uses, but are quite a bit more
expensive than the household sealant type RVT silicones.

Regards,
Scott Hanson




----- Original Message -----
From: "High Voltage list" <hvlist@xxxxxxxxxx>
To: "hvlist" <hvlist@xxxxxxxxxxxxxxxxx>
Sent: Thursday, February 03, 2005 2:28 PM
Subject: Silicone Sealants in Electrical Applications (fwd)


> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Tue, 01 Feb 2005 11:09:52 +1030
> From: Matthew Smith <matt@xxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Silicone Sealants in Electrical Applications
>
> Hi All
>
> Can anyone comment on the suitability of silicone sealants (I've got one
for
> metal roofs and gutters) in high voltage applications?
>
> Whats more, what are they like with heat?
>
> My interest is in potting/mounting.
>
> Cheers
>
> M
>
> --
> Matthew Smith
> Kadina Business Consultancy
> South Australia
> http://www.kbc.net.au
>
>