Pectinase is an enzyme that breaks down pectin, a polysaccharide found in plant cell walls. Commonly referred to as pectic enzyme. It is routinely used to extract juice from fruit more easily, especially apples. Pectinase is used extensively in winemaking, primarily to separate the juice from the mash. It also helps to clear wine, which pectin can make cloudy. 1 pack is often added to 23 litres of juice.