Abstract: A mobile fireproofing and specialty coating apparatus comprising a trailer, a generator mounted on the trailer, and a fuel tank connected to the generator for powering the generator. There is a work platform mounted to the trailer to allow the operators to work directly on the unit. A mixer for mixing a dry product with water is mounted on the work platform and comprises a vat, a rotatable mixing tool and a motor for rotating the mixing tool. The motor is powered by the generator. A pump is connected to the generator and is mounted adjacent the mixer. A hose is connected to the pump and to a spray nozzle for spraying the product. There is a second mixer for mixing accelerator with water mounted on the work platform, and comprises a mixing tank, a rotatable mixing tool and a motor connected to the mixing tool and the generator.