Nilco C9 Cabinet Dishwasher Rinse Aid is an acidic, water-based, concentrated rinse aid designed to provide virtually spot and smear free finishes on all catering utensils including dishes, plates, cutlery, glassware, silverware, and plastics. Where to use In commercial automatic dishwashing equipment in the final rinse water where it promotes water shedding and rapid drying. There is normally no need to polish items finished with this product. Where not to use On any application other than that shown in where to use.