LEWCO Style 3000SAR-2 is an asbestos free woven fiberglass fabric impregnated with a special chemical, water, and oil resistant silicone rubber.LEWCO Style 3000SAR-2 is a heavy weight fabric for welding curtains and fire blanket applications.The silicone coating is designed to prevent dust and fly. This material has been tested and meets NFPA 701 – 1999 Fire Tests for Flame Resistant Textiles and Films Method 2.