What Is Aircraft Deicer Made Of?

Aircraft Deicing & AntiIcing Procedure, Equipment & Fluids Aircraft
Aircraft Deicing & AntiIcing Procedure, Equipment & Fluids Aircraft from aviationlearnings.com


As winter approaches, airports and airlines prepare to face the challenges posed by icy conditions. One crucial aspect of ensuring safe flight operations in cold weather is the use of aircraft deicers. These specialized fluids help remove ice, frost, and snow from aircraft surfaces, ensuring optimal performance during takeoff and flight. But have you ever wondered what aircraft deicer is made of? In this article, we will explore the composition and characteristics of these essential fluids.

The Basics of Aircraft Deicers

Aircraft deicers are formulated to effectively remove ice and snow from various surfaces of an aircraft, including the wings, tail, and fuselage. They are typically applied just before takeoff or during ground operations. Deicers work by melting ice and preventing its reformation during flight. They come in two primary forms: Type I and Type IV.

Type I Deicers

Type I deicers are the most commonly used fluids for removing ice from aircraft surfaces. They are usually orange or light yellow in color and have a low viscosity, allowing them to flow easily. These fluids are composed of a mixture of propylene glycol and water. Propylene glycol serves as the main ingredient, while water is added to enhance its effectiveness.

Type IV Deicers

Type IV deicers are also known as anti-icing fluids. Unlike Type I deicers, these fluids are designed to prevent ice from forming on aircraft surfaces. They have a higher viscosity and are usually green or light yellow in color. Type IV deicers are typically composed of a mixture of propylene glycol, thickeners, corrosion inhibitors, surfactants, and other additives.

The Composition of Aircraft Deicers

While the exact formulation of aircraft deicers may vary among manufacturers, they generally consist of three main components: glycol, water, and additives.


Glycol, specifically propylene glycol, is the primary ingredient in most aircraft deicers. It has a low freezing point and effectively melts ice and snow on aircraft surfaces. Propylene glycol is a non-toxic compound and poses minimal risk to the environment.


Water is a crucial component in aircraft deicers as it helps enhance the effectiveness of glycol. It acts as a carrier, allowing the deicer to spread evenly across the aircraft surface. Water also aids in melting ice and snow, making the deicing process more efficient.


Additives are included in aircraft deicers to enhance their performance and provide additional benefits. These additives may include corrosion inhibitors to protect the aircraft from damage, surfactants to improve the spreading capabilities of the deicer, and thickeners to increase viscosity for anti-icing fluids. Other additives may be included to address specific requirements or environmental considerations.


Aircraft deicers play a vital role in ensuring safe and efficient flight operations during winter. These fluids are composed of a mixture of glycol, water, and additives, designed to melt ice, prevent reformation, and protect the aircraft from corrosion. Understanding the composition of aircraft deicers helps us appreciate the science behind their effectiveness and the importance of their application in cold weather conditions.