I think what you are refering to is DIELECTRIC GREASE. A type of silicone grease to insulate arround coils, distributor caps etc.
Now most peltier and Vaporchill users will fill the socket full of this. They also coat the pins and bottom of the processor. This stops water from condensing on the parts it is applied to. I also assume it could be used to cover the bridges on the athlon processors . This would somewhat protect them if too much artic silver is applied. But it would take a lot of A/S to squeeze out all the way to the bridges.
I aint signing nothing!!!