Cat® High Vacuum Grease is a silicone-based grease, excellent for rubber, plastic, and ceramic surfaces, making it ideal for use in plug valves, control valves, and flow meter bearings. It performs well under high temperatures, with operating capabilities up to 400°F, and is commonly used in applications involving spark plug boots, distributor cap nipples, battery terminals, ignition coil connectors, and trailer electrical connectors. This formula offers superior release characteristics while maintaining the excellent dielectric properties typical of silicone compounds. This is not recommended for use with silicone rubber seals or O-rings