Johns Manville Insul-SHIELD® is a series of flexible, semi-rigid or rigid thermal and acoustical fiberglass insulating boards for custom curtainwall applications. Insul-SHIELD is fire-resistant and non-combustible, available faced and unfaced, and designed to be used in new and retrofit construction, metal panel buildings and in general construction. They vary in density and are made from inorganic glass fibers bonded with a thermosetting binder.