What Type of De and Anti-Icing Fluids are Available and How Do They Differ?
There are three core families of fluids: Type I, Type II and Type IV and they differ according to their function and the holdover (ongoing anti-icing protection) they provide. Type I fluids are primarily used for de-icing and do not offer any significant holdover protection, so are often used as part of a two step de-icing / anti-icing procedure. A range of this type of fluid is available. The fluids are all coloured orange for ease of recognition, offer good sprayability with minimal foaming, and have a pH around 8.5 to 9.5. Type I fluids are always applied diluted and heated. Type II fluids can be used for de-icing purposes, but unlike Type I fluids, they also offer extended anti-icing holdover protection and can be used unheated and diluted or undiluted for anti-icing, heated and undiluted for de and anti-icing as a one step process, diluted with water and heated for de and anti-icing as a one step process, or diluted with water and heated as the de-icing stage in a two-step process
