3 oz tube Super Lube Silicone High-Dielectric & Vacuum Grease Super Lube Silicone Dielectric Grease is a non curing Silicone compound utilized for sealing, protecting and insulating electrical components and connectors. Super Lube Silicone Dielectric Grease is waterproof and ...3 oz tube Super Lube Silicone High-Dielectric & Vacuum Grease Super Lube Silicone Dielectric Grease is a non curing Silicone compound utilized for sealing, protecting and insulating electrical components and connectors. Super Lube Silicone Dielectric Grease is waterproof and protects against moisture and other contaminants in electrical connections, is translucent white, clean and clear in appearance and exhibits high dielectric strength and is compatible with most plastics and withstands temperatures from -40 F to 500 F.