JIT Silicone Transformer Oil (JIT STO) is a 100% linear Polydimethysiloxane fluid (CAS# 63148-62-9) with viscosity of 50cSt (centistoke) @25°C. JIT STO is formulated specifically for use as a dielectric fluid and coolant in electrical transformers. Unlike conventional polydimethylsiloxane fluid, JIT STO is formulated to contain <50ppm water content to ensure the highest degree of dielectric strength and stability. JIT STO is characterized by its high dielectric strength, wide service temperature range, high flash point, low vapor pressure, low viscosity change at temperature extremes and inertness to virtually all substrates. It contains no additives (such as thermal stabilizers). Ultimately JIT STO will prolong the service life of the transformer and reduce maintenance. JIT STO is an environmentally sound and safe replacement for PCB containing askarels as the dielectric coolant for liquid-filled transformers. It's high thermal stability makes it a good choice for transformers located indoors or next to buildings where a thermally stable fluid is more critical.
Comparable to Dow Corning® 561