... food preservatives, such as: cake, pastry, snack foods, butter, salad, sauce, beverage, wine, meat product, can, etc. You may confect the ... food or on food surface.USAGE:You may confect the 5-10% ε-Polylysine solution with cold boiled water or distilled water ... direct sunlight, under 15°C. Shelf life is 2 years. natural preservative e-Polylysine