If you don't want to believe me... Listen to Professor Google
Do you silicone grease conductors or connector housing?
Silicone grease is used to seal the connector housing and exterior terminals, rather than the mating surface of the conductors themselves. It is an electrical insulator. Applying it directly between mating electrical contacts can increase resistance and cause connection failures, though it creates an excellent weather barrier on the outside.
Connector Housing
(Yes)What it does:
Silicone grease provides a protective barrier on weather packs, O-rings, and rubber seals.
Benefits: It prevents water, salt, dust, and debris from reaching the pins.
It also lubricates the plastic components,
making the connectors much easier to plug in and uncouple without damaging the seals.
Conductors / Mating Pins
(No)
What it does:
Because it is an electrical insulator (dielectric), it blocks the flow of electricity if it sits between the metal-on-metal contact points.
The risk: Coating the conductive pins can introduce a resistive barrier, leading to voltage drops, intermittent disconnections, and localized heating.
For low-voltage or signal-level circuits, this can completely disable the connection.
Best Practices for Application
Make the connection first: Always ensure the wire-to-wire or pin-to-pin mechanical connection is fully seated and secured.
Apply to the exterior: Smear a thin coat on the back of the connector wire seals, the connector’s outer mating lip, or over exposed exterior hardware (like battery terminals) after they are tightened.
Use a contact enhancer if necessary: If you are looking to protect metal contacts from corrosion while improving conductivity, a specific conductive grease (
not silicone-based) should be used.
Full disclosure... Google nor I are certified RCA engineers
