Ground Retardant

FR-600 Ground Applied

FR-600 is our ground optimized liquid concentrate long-term retardant, specifically designed for utility right-of-way protection in high risk fire areas. This product is currently undergoing qualification testing with the United States Forest Service (USFS).

FR-600 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. This formulation is specifically designed for large area applications using standard ground application equipment. FR-600 pretreatments are most effective when applied at the beginning of the wildland fire season, and will remain effective until diluted by substantial rainfall.

FR-600 Retardant properties

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Testing with USFS

Currently undergoing testing with the USFS. Can be used without formal approval on the USFS Qualified Products List.

Liquid Concentrate

Designed for wet concentrate storage and wet base operations.

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More Active Ingredient

Higher salt content to better stop ignitions and fire spread, and maximize longevity. Developed for long-term pretreatment of Tier 3 hazardous wildland fuels.

Ground Optimized

Formulation optimized for pre-treatment of utility right of ways and infrastructure with exceptional durability and rain resistance.

Low Viscosity

Gum-thickened low-viscosity for penetration of dense fuels.

Optional 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.

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

Phone: (530) 208-3234

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