What determines the viscosity of Type 1 de-icing/anti-icing fluid?

The viscosity of Type 1 de-icing/anti-icing fluid is primarily determined by temperature. As temperature increases, the viscosity typically decreases, making the fluid more flowable. Conversely, lower temperatures lead to higher viscosity, which can affect the fluid's ability to spread and adhere to the aircraft surfaces during the application process.

Understanding this relationship is crucial for ensuring that the fluid performs effectively in colder environments, where de-icing and anti-icing properties are essential for safe flight operations. Temperature management is therefore vital in the handling and application of these fluids.

While thickening agents and viscosity modifiers contribute to the formulation of the fluid and can impact its flow characteristics to some degree, the primary factor influencing viscosity in practical terms is the ambient temperature at which it is used. The dispensing equipment, while important for the application, does not influence the inherent viscosity of the fluid itself.