Thermafiber Safing provides thermal insulation, fire containment, and enhanced acoustical performance in many different UL and Intertek (formerly OPL) listed fire containment assemblies of 1, 2, and 3-hr ratings. Thermafiber Safing insulation products are designed to provide fire protection in perimeter fire containment systems, floor and wall penetrations, construction joints, and other fire stopping applications. These products are non-combustible, moisture-resistant, non-corrosive, non-deteriorating, mildew proof and vermin-proof.