Extract is a low foaming cleaner designed for use with spray extraction machines. Extract is used with both hot and cold water. It may also be used as a pre-spray for heavy soiled or stained areas before general cleaning. Usage is dependant upon the type of carpet being cleaned. However, 5 litres of Extract should be sufficient to clean approximately 250 square metres of most carpets. Extract should be protected from extremes of temperature. In unopened containers, the product is stable for at least one year .