MDF-500 will freeze at a 32 Fahrenheit (0 Celsius), with a boiling point at 212 Fahrenheit (93 Celsius). MDF-500 will begin to degrade at a higher rate when subjected to temperatures in excess of 120 Fahrenheit (49 Celsius). When Parts A + B are mixed, the freezing point of the solution remains the same at 32 Fahrenheit (0 Celsius). We recommend storing the MDF-500 components in a cool dry environment protected from dry sunlight or UV light.