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This product is a rigid lining made from fire resistant glass fiber bonded together with thermosetting resin. The surface exposed to airflow and the borders are protected by a state of the art durable acrylic treatment.
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Johns Manville’s Spiracoustic Plus System is made of dense glass fiber specially designed to provide a high performance acoustical and thermal insulation in all round or oval ventilation ducts of almost any size. Easy to install.