Ideal in the winter months for the drums when the coconut oil solidifes. The heating is controlled by an adjustable thermostat. Flexible springs are used to attach the silicon heater around our 55 gallon drums. The ideal temperature to keep the thermostat on while melting the oil is around -70-80 degrees celcius. This way you wont burn yourself if you need to move the drum around, and the oils melts at a steady pace.