Z-BLOCK

fiberglass, non-asbestos, fire and smoke curtains for use in theaters, schools, and other buildings to prevent the spread of fire and smoke; material for thermal insulation and fire protection, namely, fire-resistant fabric made of fiberglass

non-flammable textile material not of asbestos for use in the manufacture of insulation, sealants, padding, tape, tubing, and fabricated products for welding, fire, cold, and electrical insulation and stress relief and chemical barriers