What is the typical purpose of spray-applied cementitious fireproofing?

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Spray-applied cementitious fireproofing is used to shield structural steel from heat by creating a thermal barrier. This coating slows heat transfer to the steel, helping the member maintain its strength for the duration of its fire-resistance rating and reducing the risk of collapse during a fire. It isn’t intended for decorating surfaces, sealing air leaks, or insulating electrical wiring.