Phonisol BM series are composed of polymers filled with naturally occurring minerals, mainly barium sulfate and calcium carbonate. Phonisol BM0050 contains no lead, unrefined oils or bitumen. All mineral fillers are naturally occurring ground powders which are chemically unaltered from the state at which they were originally mined. Sound Reduction Index (R) have been tested against EN ISO 10140-2:2010.
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