Our Fog and Haze fluid is a glycol/water-based solution used in producing atmospheric effects. The fluid is heated in its accompanying machine and expelled into the air. Fog is generally heavier making it denser and quicker to dissipate than haze fluid. Haze fluid is lighter with a longer hang-time. It is commonly used in conjunction with light fixtures to enhance the visibility of light beams. We recommend using the appropriate specified to each machine.