This premium water based fog machine fluid is a high density odorless, non-irritating, non-toxic, non-flammable formulation. Fog Worx Low Lying Fog delivers excellent dispersion across the ground for a great Halloween graveyard effect. This product is designed for use with any water based fog CHILLER machine. 8 ounces of Fog Worx Low Lying will typically last 1-2 hours depending on machine.