Armcoltherm SF-5 is a silicone fluid heat transfer fluid, a specifically engineered, exceptionally stable, and enduring silicone polymer tailored for utilization in high-temperature liquid-phase heat transfer fluid systems, with a recommended operating temperature range of -40°F to 838°F (-40°C to 430°C). Its thermal stability is excellent, so it is very difficult to produce carbon deposition and thermal cracking.