Rosco Fog Fluid was formulated almost 30 years ago as an alternative to oil-based fluids and has been a staple of stage and screen ever since. It is being used increasingly for live entertainment events both large and small. There's Rosco Fog Fluid for every effect from the slightest wisp, to theatrical haze or heavy fog. Standard Rosco Fog Fluid can be used in a wide selection of Rosco fog machines and is known for its extensive range of effects as well as its maximum "hang time." It has a cosmetic green color (not evident in the fog) and light scent.