Is silicone oil with viscosity 5 volatile?
It will not volatilize.
Silicone oil is generally colorless (or light yellow), odorless, non-toxic and non-volatile liquid. It has low vapor pressure, high flash point and ignition point, and low freezing point.
The main use of silicone oil is as high grade lubricating oil, insulating oil, defoamer, polishing agent and shockproof oil
http://www.siliconeoil.net 
