The basics Zout® is the original stain remover that was developed in the early 1960s as a professional cleaning solution for doctors' and nurses' uniforms. The benefits Engineered with an advanced triple enzyme formula technology for a wider variety of fabrics and stains. It works great on cotton and polycotton. The uses Zout Action Stain Remover expertly gets rid of oil, grass, baby food, sports drinks, BBQ sauce stains and more! The bottom line Enzymes are specially designed to help break down specific stain types so that they can be more easily removed in the washer.