E-Wrap Endothermic Wrap is a protective wrap designed for fire protection of critical circuits and infrastructure such as fire pumps, signaling equipment, elevators, alarms, process control equipment, emergency responder communications enhancement systems (ERCES) as well as fuel oil piping. When installed around Electrical Metallic Tubing (EMT), conduits, cable trays, or pipes, E-Wrap releases chemically bound water to have a cooling effect providing up to 2 hours of protection ensuring continued operation under fire conditions.