Electric Heating jackets are highly flexible in nature and can be used to raise and maintain the temperature of contents in tanks, reaction kettles, uneven shaped vessels, dish ends, conical bottoms of vessels where the heat is required. This flexible electric heater provides heat from external surface of the device to be heated. Being an external heating system, maintenance is possible without the need for costly, disturbing shutdowns. High flexibility also ensures that good heating element contact resulting in lower element temperature and hence long life.