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Tontine Black Liner Acoustic Ceiling Overlay Performance Graphs TBL Ceiling Overlay. A performance worth shouting about. Superior Noise Reduction Coefficient TBL has consistently performed well under strict NRC testing. As a reliable performer, TBL has to be considered where noise reduction is critical. Compression Resistance Tontine Fibres was established in 1870, and is a leading national manufacturer supplying a diverse range of products to Australian industry. Today, as part of the Pacific Dunlop Group, it is continually researching markets to provide industry with technologically advanced, safe products - Tontine Black Liner (TBL) is such an advance.