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This coating deprives the fire of oxygen and reduces its intensity. It allows firefighters on the ground to safely approach and extinguish the blaze with minimal risk of flare-ups due to wind changes or dry conditions.

Phos-Chek, a fertilizer-based liquid, is one of the most commonly used fire retardants dropped from planes. It is a direct firefighting agent that contains polymers, surfactants, water, and other additives.

The polymer helps create an aqueous film on the fuel and acts as a protective barrier. The surfactants help reduce surface tension. This allows the fire retardant to penetrate the surface, while the other additives help reduce flammability.

Firefighting aircraft types

This tactic is typically used when the fire’s path is more predictable. It allows firefighters to strategically position the retardant to prevent the fire from jumping to new areas. Indirect attacks are especially effective in difficult terrain or areas where direct attacks would be too risky or less effective.

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Indirect attacks involve dropping fire retardant chemicals on unburned areas ahead of the fire to create a buffer zone, also known as a firebreak. The chemicals coat vegetation, making it less flammable and significantly reducing the chance of ignition if the fire reaches that area.

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The key ingredient in Phos-Chek is ammonium phosphate. It forms a thin coating over combustible materials. For example, wood or brush when applied via air tanker or helicopter bucket drops.

While exposure to diluted retardants is generally not acutely toxic to humans, it can irritate in some cases. Long-term environmental effects are still being studied. This makes it essential to use these chemicals carefully and avoid sensitive areas like waterways.

Every summer, we hear news reports of wildfires raging across the western United States. As firefighters work to contain these blazes, air tankers drop fire retardant on the flames to reduce their intensity.

List of firefighting aircraft

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In the United States, firefighting strategies range from the ground to the air. Aerial firefighting is one of these strategies. It involves dropping water and fire retardant from planes to slow or stop the spread of a wildfire.

Phos-Chek also acts as a buffer between vegetation and flame-generated heat. This helps protect trees, shrubs, and other foliage from burning up completely should they come into contact with fire.

Fire retardants used in aerial drops contain ammonium phosphate or ammonium sulfate. These are effective in controlling wildfires but can pose environmental and health risks. These chemicals can disrupt soil and water ecosystems, potentially harming plants and aquatic life.

Fire retardant is a mix of chemicals designed to help extinguish or slow the spread of wildfires. The exact ingredients can vary depending on the fire's fuel, as different chemicals are needed to combat other fuels.

Aerial firefighting aircraft

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From our revolutionary Phos-Chek fire retardants to our non-toxic flame retardant sprays, we have what you need for your aerial firefighting needs.

These chemicals, which are dropped from planes alongside water, are critical components of aerial firefighting for slowing or stopping the spread of wildfires.

Additionally, since Phos-Chek contains fertilizer components (up to 11% nitrogen), areas affected by the fire will begin regrowing sooner. This is because beneficial nutrients are added directly into burned soil. This helps to prevent erosion caused by heavy rains post-fire season.

We offer a wide range of fire retardants and other fire protection products that can help slow or stop the spread of wildfires.

In a direct attack, fire retardant chemicals are dropped directly onto the active flames or burning areas to reduce the intensity of the fire quickly. This method works by lowering the combustion temperature and altering the chemical reactions within the fire, essentially smothering it and cutting off its fuel source.

Direct attacks are often used when there is an immediate threat to structures, infrastructure, or personnel on the ground, providing critical support to firefighters by slowing the fire’s spread and allowing ground crews to contain the blaze more effectively.