An assembly for repairing a damaged portion of a fusion bonded epoxy coating on a steel body of a pipe at least partially surrounded by an undamaged portion of the coating. The assembly includes a housing defining a cavity therein and having an opening in communication with the cavity, the housing being attachable to the pipe to locate the cavity in communication with an epoxy patch positioned on the steel body to replace at least the damaged portion. The assembly also includes a heat source positioned for directing heated air heated thereby into the cavity, for curing the epoxy patch. The opening is at least partially defined by a perimeter, and the assembly includes an insulation strip positioned on the perimeter for impeding heat transfer from the housing to the undamaged portion of the coating when the housing is attached to the pipe.