Dielectric grease
From: PEUGPETE@AOL.COM
Date: Fri 26 Mar 2004 - 11:14:24 EST
GROUP
I've had a couple people ask about dielectric grease, so I thought I
would put this out.
The primary purposes of dielectric grease is to keep out moisture, and
prevent corrosion. Prevention of corrosion keeps the metal-to-metal contact point in
a connector conducting electricity. If the grease conducted electricity, it
would allow the tracking to ground of the power or signal being conducted. It's
neutral and forms an excellent 02 block. Also lubricates but w/o any specific
bulk. Wont' work for heavy loaded bearings, etc. Great for multiple plug
blocks, relay contacts, slide contact switches, rubber lube, speedo cables when
combined w/graphite, etc. In addition it is used for a heat conductor when some
electronic components are mounted on surfaces to dissipate heat (like the
ignition power stage on coils). It is non-conductive, but when you slide the
connectors together there is metal-to-metal contact and the grease gets displaced
but the area around connector is protected from moisture. If the grease was
conductive it would be too easy to get "bleed" from one pin to another in a
connector if the grease got hot and liquified and spread. DO NOT ever grease an
oxygen sensor connector as the sensor is vented through the wiring on many
sensors and the grease will contaminate sensor over time and it will cease to
function. It helps keep the contact clean. Dielectric grease can be used to improve
conductivity in bullet and spade connectors while protecting the joints from
exposure to moisture, dirt, acid, what-have-you. Check the local auto supply.
PP
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