Aerial Retardant

FR-100 Aerial Dry Bulk LTR

FR-100 is our first generation aerial dry powder long-term retardant, with a medium viscosity rating and fugitive coloring. FR-100 has successfully completed all of the required US Forest Service Laboratory tests for fire retardancy effectiveness, toxicity, anti-corrosion, stability, and viscosity making it the first newly formulated long-term retardant product to make it onto the Forest Service's Qualified Products List (QPL) in over two decades. An operational field evaluation (OFE) is scheduled for the 2021 fire season and will be the final step in obtaining USFS certification.

FR-100 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.

FR-100 Retardant properties

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Interim Qualified, Listed on USFS QPL

Exceeded performance standards on every official USFS lab test.

Dry Powder Concentrate

Designed for dry bulk storage and dry 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.

Medium Viscosity

Gum-thickened medium viscosity for improved drop characteristics.

Standard Fugitive Coloring

Visible coloring 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.

If you would like more information about Fortress’s fire retardant please contact:

Phone: (530) 208-3234

FR-105 HV Dry powder Aerial LTR >