Silicone Free Synthetic Grease is filled with metal-oxide and can withstand temperature up to 200 degree C. The Synthetic Grease is formulated to enhance heat transfer across the interface between the semiconductor case and the heat sink. The Synthetic Grease reduces dry interface case-to-sink thermal resistance from 50% to 75%. The Silicone Free Synthetic Grease exhibits virtually no bleed or evaporation even in a vacuum atmosphere.