Type 4 Deicing Fluid

Type ii and iv fluids may be applied heated or cold and diluted or full strength. For de icing it is the heat and hydraulic force that accomplish the task. Type i fluids have the shortest hot.

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Type iv fluids offer maximum anti icing holdover protection but can also be used for de icing purposes.

Type 4 deicing fluid. Polar guard advance polar guard advance is a propylene glycol based type iv aircraft deicing anti icing fluid that meets the current revision of sae ams 1428 1 with low viscosity for easier handling and application and the lowest operational use temperature lout in the industry. An ethylene glycol based sae ams1428 type iv fluid that is formulated to be used neat undiluted as an anti icing fluid for extended holdover endurance times during active snow freezing rain precipitation weather events. For additional fluid requirements see reference section paragraph 4 1. In general deicing anti icing fluid may be uncolored if so requested.

Similar to type ii fluids type iv fluids can be used in a variety of ways. Polar guard advance is supplied as a ready to use formulation. Regulations may vary in different locations. Colour for type ii fluids and green is the colour for type iv fluids.

For anti icing it is primarily the heat imparted to the airframe that accomplishes the task. This fluid has a low viscosity and flows off of aircraft easily. Water freezes at 0 c. 1 1 1 fluid handling and storage.

When a type i fluid fails it fails suddenly. The colour for type iii fluid has not yet been determined. Characterization and compliance with applicable laws are the responsibility solely of the generator. Ams 1424 type 1 deicing fluid page 2 of 9 p501.

Pearson airport cyyz faa link for information on de icing and anti icing fluids. However a mixture of 70 percent deicing fluid and 30 percent water freezes below 55 c. Treatment storage transportation and disposal must be in accordance with federal state provincial and local regulations. Deicing fluids work best when they are diluted with water.

Designed to meet sae type i and ams 1424 specifications for de icing aircraft type 1 de icing fluid is made from propylene glycol. Unheated and undiluted or diluted for anti icing. This fluid is not to be used when temperatures are under 22 f. The differences between type i and type iv de icing fluid.

For example undiluted dow ucar deicing fluid type i ethylene glycol has a freezing point of 28 c. Type iv de anti icing fluids are manufactured and qualified to ams 1428 iso 11078 specifications.