Acoustic insulation barrier articles and insulation materials in the nature of panels, tiles, slats and baffles; insulation and acoustic insulation barrier articles and materials, namely, panels, tiles; insulation and acoustic insulation barrier articles and materials, namely, panels, tiles, slats and baffles; fire-resistant and fire preventive articles and materials, namely, composite panels made of aramid, glass, carbon or ceramic fibers, asbestos curtains, fillers for expansion joints, gra...