Formulated with high quality urea and pure demineralized water, Prestone's DEF is approved for all SCR-equipped engines, including cars, SUVs, heavy duty trucks, and farm equipment. This product is certified to meet all API & ISO 22241 requirements and is compatible with AdBlue and other DEF products. It has a freezing point of 12 degrees Fahrenheit, however freezing will not harm the product. Diesel Exhaust Fluid has a shelf life of at least 2 years and should be stored at room temperature.