SiSiB® PF8704 Silicone Diffusion Pump Fluid is a single component fluid designed for high vacuum applications in the range of 10-6 to 10-8 torr (untrapped) and 10-10 to 10-11 torr (trapped).
Its low vapor pressure and thermal stability make it popular in processes such as vacuum coating, metallurgical work, and various other applications.
SiSiB® PF8704 phenyl methyl silicone oil is equal to DowCorning’s DC-704, Shin-Etsu’s HIVACF-4
Color and Appearance
Colorless to straw-colored fluid
Ultimate Vacuum, torr
10-7 to 10-8 untrapped
10-10 to 10-11 trapped
Extrapolated Vapor Pressure, torr, 25°C
2 x 10-8
Specific Gravity at 25°C
Refractive Index at 25°C
Viscosity at 25°C
Flash Point, open cup
Boiling Point, 0.5 torr
Typical Boiler Temperature
Surface Tension, dynes/cm
Heat of Vaporization, kcal/g mol
As for the use of silicone oil, SiSiB® PF8704 can be used in a variety of applications including: Aerospace, Electronics, Metallurgy, Vacuum Coatings, and Atomic Energy etc.
SiSiB® PF8704 silicone diffusion pump oil is supplied in 1Kg bottles, 5Kg 25Kg pails, and 200Kg steel drums.
In the original unopened packaging, SiSiB® PF8704 has a shelf life of 60 months.