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Silicone sealing of electrical connectors

Silicone sealing of electrical connectors

Silicone sealing of electrical connectors

(OP)
I've heard of a process used in hermetically sealed electrical connector manufacture where the connector is dipped in silicones and baked to remove the volatile components, leaving behind an SiOx film that seals microcracks in the glass insulators. This allegedly results in a higher insulation resistance than could otherwise be achieved. Can anyone tell me if this is a common practice and, if it is, what the mechanism is for it to work? Is this an acceptable means of increasing the IR?

RE: Silicone sealing of electrical connectors

(OP)
Thanks. I'm aware of the epoxy encapsulation technique. However, this is more of a film applied and baked on the connector. It doesn't change the appearance of the connector at all.

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