Dielectic grease for electrical contacts and brake pad sliders...?

[Grahamm]

Having had a problem with corroded electrical connectors, I'm looking at getting some Dielectric (non-conducting) Grease to put on them to repel water and keep them clean.
I've looked on eBay and Amazon and there's various silicone greases which apparently can also be used on brake slider pins!
Has anyone used this stuff and can comment or recommend?