Next-Gen Aerial Retardant

Fortress fR-205 HV Liquid Aerial LTR

FORTRESS FR-205 HV is our next-gen iteration on the FORTRESS FR-200 aerial liquid concentrate long-term retardant, with a low viscosity rating and high-visibility (HV) fluorescent coloring. FORTRESS FR-205 HV brings new features to the frontlines of firefighting, and further improves on the environmental and safety profile of its predecessor. FORTRESS FR-205 HV is currently undergoing qualification testing with the United States Forest Service (USFS).

FORTRESS FR-205 HV features our unique magnesium chloride formulation, which means that it's more effective, safer for the environment, and more durable than conventional, fertilizer-based retardants.

FORTRESS FR-205 HV Retardant properties

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Testing with USFS

Currently undergoing qualification testing with USFS.

Liquid Concentrate

Designed for wet concentrate storage and wet base operations.

Aerial Optimized

Engineered for stronger fire barriers and superior fire control. Qualified for use with large airtankers, Very Large Air Tankers (VLATs), Single Engine Air Tankers (SEATS), and helicopters.

Low Viscosity

Gum-thickened low viscosity for improved drop characteristics.

High-Visibility Fluorescent Fugitive Coloring

Provides higher visibility during the day and at night, and fades over time when exposed to sunlight.

Hygroscopic Recharge

Self-hydrating when humidity exceeds 35%, enabling better fuel coverage, more effective fire suppression, and extended durability.


Not a fertilizer, does not contribute to the growth of flammable vegetation or freshwater eutrophication, does not contain any biocides, and is significantly less toxic to fish.

Corrosion Inhibited

Corrosion inhibitor package minimizes corrosion on steel, brass and aluminum, making it safe for use around steel utility infrastructure.

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