Composed of fiberglass insulation mat between 2 layers of fiberglass fabric that is coated with specially formulated black silicone compound, 3-in-1 Fire Quilt™ can be used as FM-Approved curtain, blanket, or pad when welding, grinding, or brazing. Each 4 x 4 ft pad comes with grommets on one side for hanging for vertical work. Reusable and transportable, product repels water, grease, and dirt and is approved for all hot work in accordance with NFPA 51B requirements.