Davies “TKS-FLUID” meets the rigid DTD 406-B British specification for wing, tail and propeller de-icing systems. “TKS-FLUID” is used in Raytheon aircraft, Hawker, Sidley, Dehaviland, Cirrus Design’s SR-22, (and others) with the TKS de-icing system. Special holding tanks in the plane store the fluid, which is pumped to leading wing edges, etc., when needed, to melt away ice. “TKS-FLUID” is a specified mixture of chemicals, compounded and tested within tight tolerance to enable effectiveness, stability and ease of use. British Aerospace, Inc. manufactures Hawker Sidley aircraft, which use “TKS-FLUID”. There are many Hawker Sidley airplanes flying in the United States with Davies “TKS-FLUID”, also Cirrus Design’s SR-22 uses Davies “TKS Fluid”. Raytheon Aircraft Corp. also uses “TKS-FLUID”. Testing: “TKS-FLUID” can be easily field tested for contaminants (due to open drums, dirty pumps, etc.) with: Conductivity Meter, Hydrometer, Thermometer, and a Hydrometer Cylinder. These tools are all available upon request.