PIN FR eco-benign wildfire stop spray coat
Ammonium polyphosphate – triazin spray can provide eco-friendly fire block protection of vegetation. Wildfire frequency is increasing globally with climate change. The difficulty of extinguishing wildfires means that establishing effective firebreaks is essential to protect lives and property. In this lab test, a 40% solution of commercial PIN FR ammonium polyphosphate (APP) with a lab-synthesised triazine was tested as a spray-on firestop on dry pine needles with a horizontal flame and various wind speeds, at approx. 1 m2 scale. The PIN FR solution reduced total heat release by -30% and smoke production by nearly -20%. The phosphorus content of the APP was considered to catalyse release of polyhydroxyl compounds from the vegetation material, so resulting in fire-protective charring. The authors conclude that this PIN FR solution could be an effective fire break, with spray application onto vegetation by drones.
“Development of eco-benign firebreaks based on flame-retardant ammonium polyphosphate hybrid system”, W. Ye et al., Sustainable Materials and Technologies 43 (2025) e01208, https://doi.org/10.1016/j.susmat.2024.e01208
