Bitumen based self adhesive sound damping sheet with aluminium foil facing on one side for improved fire performance. Approx 1.5mm thick. For inside doors, roofs, bulkheads and floors. Designed to minimise acoustic and vibration radiation of sheet metal. Also improves sound insulation by adding mass. Approx 0.75m x 1m. Only fit at temperatures above 10 degrees centigrade. Silver diamond pattern.