Phos-Chek
Phos-Chek is a brand of long-term fire retardants, class A foams, and gels. retardant is applied ahead of wildfires to homes and vegetation by ground crews and aerial firefighting units. Some of the main components of Phos-chek retardants include ammonium polyphosphate, diammonium phosphate, diamMonium sulfate and guar gum.