de icing
depend on type of aircraft,type of fluid used. onestage or two. in fact all types are available ie type 1 2 3 and 4.though not been able to find a holding type for type 3
depend on type of aircraft,type of fluid used. onestage or two. in fact all types are available ie type 1 2 3 and 4.though not been able to find a holding time for type 3