Perimeter fire containment systems designed with Firespan mineral wool insulation blankets provide fire resistance, thereby maximizing life safety in structures subject to fire outbreak from any number of unsuspected sources, such as a terrorist attack, arson or simply a careless smoker. The blankets withstand temperatures in excess of 2,000 degrees F for more than four hours. The company’s other mineral wool insulation products offer similar fire resistance laterally, when incorporated in partition walls.