Clearco High Temperature Silicone Bath Fluids are formulated for high temperature baths applications and high temperature heat transfer applications that exceed 200°C

Both the DPDM-400 and PM-125 High Temperature Silicone Bath Fluids are clear, colorless, and odorless fluids that in the phenyl class of silicones. Their high flash points, high service temperature ranges, low vapor pressure, high resistance to oxidation and high resistance to shear characterize the DPDM-400 & PM-125 High Temperature Bath Fluids.

Although DPDM-400 and PM-125 High Temperature Bath Fluids have pour points of –30°C and –51°C, they are not recommended for low temperature applications due to their high VTC (viscosity-to-temperature coefficient). At low temperatures, their viscosities increase significantly making them poor choices for applications below ambient.

DPDM-400 High Temperature Bath Fluid is a Diphenyl-Dimethylsiloxane (CAS# 68083-14-7) with a viscosity of 400cSt. It will remain stable at 250°C (open system) for 1,500 to 2,000 hours without gelling or breaking down. In closed system baths*, DPDM-400 High Temperature Bath Fluid will remain stable at 300°C.

PM-125 High Temperature Bath Fluid is a Phenylmethylsiloxane (CAS # 63148-52-7) with a viscosity of 125cSt. It has a long term operating temperature range of 230°C (open system). At 250°C (open system), it will remain stable for approximately 1,200 hours without gelling or breaking down. In closed system, PM-125 High Temperature Silicone Bath Fluid will remain stable at 300°C.

HT-110 High Temperature Silicone Bath Fluid is is a Polydimethylsiloxane (CAS# 63148-62-9) that is heat-stabilized with an iron-siloxane additive formulated for high temperature stability >200°C (open and closed system). Due to the heat stabilizing additive, HT-110 High Temperature Silicone Bath Fluid offers significantly higher thermal stability than standard polydimethylsiloxane fluids, which will breakdown at temperature well below 200°C in an open system.

However, due to the iron-siloxane additive, HT-110 High Temp Silicone Bath Fluid has a brownish color and an odor. Because of its murky-brown color, it is not recommended for applications where the instruments need to be visible. HT-110 has been described as a “polydimethylsiloxane on steroids”. Essentially, it is a cost-effective fluid that bridges the gap between the polydimethylsiloxane class and the phenyl class of silicones.

Bath Applications include: high temperature open system baths, high temperature closed system baths, constant temperature baths, circulating thermal temperature baths, closed loop baths, high temperature heat transfer baths, high temperature heat transfer fluids, thermostat fluids, calibration bath fluids, flow test fluids.

*cSt (cs) is a centistokes...measure of kinematic viscosity[mm2/sec]
**Closed system baths are systems from which air has been excluded.

Properties

Long-term operating stability

Gel Time at Temperature (open system)