Jem Pro PRO FOG Fluid High Density - 5LJEM Pro Fog Fluid, High Density produces a very long lasting water based fog effect. Its longevity means that foggers must be programmed for short, less frequent bursts to avoid saturation of the atmosphere. By following this instruction, fluid consumption can be reduced dramatically. JEM Pro Fog Fluid, High Density is best described with the characteristics of high density, white airborne fog, with long hang time; it has a slow evaporation rate and