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De-ice / Anti-ice fluids

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Hammer time
Mar 20, 2002
Does anyone out there know the fluid colors for Type I and Type II De-ice / Anti-ice fluids?

I've tried everyplace I can think of, FAA, SAE, ISO, NBAA, etc...

I believe:

TYPE I : Red
TYPE II : Orange
TYPE III : (dunno)
TYPE IV : Green

This may depend on fluid manufacturer.
Type I is pale red
Type II is clear or "straw colored" (rarely used)
Type IV is green

As far as I know, there is no Type III in use for civil aviation. I've never seen it mentioned anywhere.

The color is important to help the deicing crew tell where it's been sprayed, and to identify the type, since your time of protection, or "holdover time", varies with the type of fluid and type of precipitation.
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Type of fluid determines holdover time. Type one is promaritly a de-icing fluid good for frost, not much else. Type two and four provide much longer holdover times and are used primarily on jet airplanes. This is due to thier non-newtonian flow characteristics.
Type 1 is as above pink/orangish and is generally a 50/50 of water and i believe glycol and is applied heated. it is supposed to have a minimum nozzle temp of 140 and is usually as hot as 160F.
Type 2 is not in use anymore( or very rarely but was straw colored)
type 4 has pretty much replaced 2 and is normally 100% with thickening agents so as to stay on wings until somewhere around 60 kts

Bottom line fuels and deice fluids are colored to verify type.

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