Actually what Manson is talking about is electrical heat tracing. I doubt they would know what heat rope would be at Home Depot. I've only seen refferences to "heat rope" in herp and astronmy circles.
I'm pretty sure electrical heat tracing does not get a s hot as heat rope. It is designed to run along pipes the wrapped in insulation. It keeps the pipes from freezing but does not get them hot. Its really cheap so its worth a try. Just dont get the type with the built in sensor as it designed to kick in when things get to cold, -5degC I belive.