Quickly and efficiently heat-up your metal or plastic drums. These heavy-duty extra-wide silicone rubber band heaters, provides better surface coverage than other traditional drum heaters. The adjustable thermostat control allows the user to set a required temperature. Made of durable vulcanized silicone rubber, fiberglass cloth, and multi-stranded grounded heating elements that provide for a long and reliable service life. The spring closure built-in to the heater allow for expansion up to 3 inch in order to fit most common drums and pails. Wrap around a metal or plastic drum to maintain temperature and viscosity extra-wide 4 inch heaters provide better surface coverage. Built-in thermostat provides adjustable temperature control. Resistant to moisture and chemicals