Dielectric grease is not a conductive material, it is an insulator. Hence, it prevents the flow of current.
Dielectric grease helps to prevent arcing between the electrical components. But before using the dielectric grease, you must know that it is an insulator. So, use the dielectric properly with an electrical connection.
The thermal paste (thermal grease) is used to drain out the excess amount of heat from the electrical circuit components like transistors, LED, etc.
When you use the silicon grease, inflate the grease only on the outer surface or body of the component. And must assure that it must not touch where you are connecting the components or in the path of the electric current.
this is conducting grease....