Expanded perlite in loose or bound form as insulating material; micro hollow spheres or foam granulate made of perlite, glass, ceramics or other non-metallic materials as aggregate for insulating materials; semi-processed plastics with embedded micro hollow spheres or foam particles made of perlite, glass, ceramics or other non-metallic materials; insulating and barrier materials, namely, acoustical insulation barrier panels, thermal insulation renders, micro hollow spheres or foam granulate ...