Syntherm-66 is a synthetic heat transfer fluid offers outstanding high - temperature performance up to 662º F(350ºC), including excellent thermal stability & low vapor pressure .These properties result in reliable, consistent performance of heat transfer systems over long periods of time. Syntherm-66 performance is proven thorough many years of industrial experience under a wide range of operating conditions. Syntherm-66 is available country wide, contact your local Syntherm-66 Sales representative for more information.