MICROLUBROL ARMASIL High-Perf 100% Silicone Oil for Airsoft Airgun Air Gun 1oz 100% Silicone Oil - NO petroleum distillates or ANY additives, solvents or propellants. Exceptional high-temperature stability during CONTINUOUS use up to 450F (230C). Viscosity exactly between that of 20wt and 30wt oil. Suitable for low-temperature operation as low as -40F (-40C ). High chemical degradation and breakdown resistance. High oxidation and gumming resistance.