Fire retardant

A fire retardant is a substance that is used to slow down or stop the spread of fire or reduce its intensity. This is commonly accomplished by chemical reactions that reduce the flammability of fuels or delay their combustion. Fire retardants may also cool the fuel through physical action or endothermic chemical reactions. Fire retardants are available as powder, to be mixed with water, as fire-fighting foams and fire-retardant gels. Fire retardants are also available as coatings or sprays to be applied to an object.

This article is about substances used to fight structure fires and wildfires. For chemical retardants used in textiles and plastics, see Flame retardant.

Fire retardants are commonly used in fire fighting, where they may be applied aerially or from the ground.

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