Phenylmethyl polysiloxane 

Phenylmethyl polysiloxane polymer that is available in a viscosity range of 50 to 30,000 cs. This phenyl silicone fluid is useful in hydraulic arrestors (snubbers); hydraulically actuated valves. As heat tranfer fluid delivers exceptional high-temperature stability during continuous use at 232°C (450°F); these materials are also suitable for low-temperature applications re pour points as low as -57°C (-70°F).

Hydraulic and heat transfer fluids