Froggys Freezin Fog is a water based fog machine fluid formulated to create optimum low lying fog effects for outdoor graveyard scenes. It is super thick on the front end and creates the perfect graveyard ground fog but here comes the good part; it is formulated to hang in the air to create the spooky graveyard scene as well. You must use a Fog Chiller or Ground Fog Machine with this fluid to create low lying fog. You get a 2 for 1 deal with the Freezin Fog that you miss out on if you use a Fast Dissipating Fluid outdoors. It is compatible with the American DJ Mister Kool Fog Machine. Freezin Fog, also known as, "Sta-Lo", "Kool Fog" or "Chiller Fog" is perfectly formulated for all water based fog machines. This fog juice was designed to be the best Halloween Fog for Outdoor Graveyard Scenes! Freezin Fog can also be used with Ice Chest Chillers, Trash Can Chillers, Kool Kore Chillers etc... Make sure to use Froggys Fast Dissipating Fog instead of Froggys Freezin Fog for Indoor Low Lying Theatrical Effects / Stage & Studio Fog that needs to dissipate before rising above the ground. You must use a Fog Chilling Device to create Low Lying Fog Effects! All Froggys Fog and Haze Fluids are made from lab-grade UV-Filtered de-ionized water and pharmaceutical grade chemicals, each approved by the FDA.