Ground Retardant

FORTRESS FR-600 Ground Applied

FORTRESS 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 fully qualified by the USFS (United States Forest Service).

FORTRESS 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. FORTRESS 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.

FORTRESS FR-600 Retardant properties

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Fully Qualified with USFS

Approved by the USFS and listed on the Qualified Products List.

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Commercially Available

FR-600 is on market and approved for purchase and application.

Liquid Concentrate

Designed for wet concentrate storage and wet base operations.

Performance Icon Fortress Fire Retardant Systems

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.

Learn more about FORTRESS FR-600 in the video below, where we explain what makes Fortress fire retardants more effective, more environmentally friendly, and best-suited for your wildfire protection needs.

See how FORTRESS FR-600  is being proactively applied to protect fire-prone California communities from roadside wildfires in this segment from NBC 7 San Diego.

FORTRESS FR-700 Structural LTR >
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