Mineral oil based defoamers are used to reduce foam and air bubbles in a variety of industrial processes. They are composed of mineral oil, surfactants and other additives. The mineral oil acts as a base and helps to reduce surface tension of bubbles, while the surfactants act as anti-foaming agents. These defoamers are widely used in a variety of industrial processes, including in food production, paper manufacturing and wastewater treatment. They are non-toxic, non-flammable and environmentally friendly.