Silicone Grease
GR 500 High-Vacuum Grease is a stiff, non-melting silicone lubricating material that maintains its consistency from -40 to 225°C. GR 500 High-Vacuum Grease is recommended for vacuums reaching between 1 x 10-5 and 1 x 10-6 mm Hg. It is recommended that the grease be preconditioned under vacuum and temperature until these limits are reached that the grease be preconditioned under vacuum and temperature until these limits are reached.