This premium, non-toxic, food-safe wood oil, and allergen-free walnut oil helps maintain natural wood beauty and integrity. This specially formulated walnut oil is high in linoleic acid and is heat-treated to make it oxidize faster. It penetrates deep into the wood and then hardens, giving you a longer-lasting finish that will not evaporate like mineral oil finishes. Walnut oil hardens into a food-safe, satin finish for bowls, butcher blocks, utensils, and other wood products. It's a slow drying oil that will cure faster in a warmer environment, and room temperature is typically best. Don't use vegetable oils to recondition your wood product as they contain ingredients that may create a culture in which bacteria can grow.