Typically the shelf life of Enrico Formella brand products is 18 months if unopened. Oil based products once opened, are good for approximately 6 months as long as the product stays below the oil surface. These products can be refrigerated, but note that the oil will solidify when cold. It is best to bring the product to room temperature before using. Vinegar based products once opened, are good for approximately 3 months. These products are required to be refrigerated once opened.