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WOOL S/M/L is an uncoated semi-rigid rock wool panel for sound absorption in cavities. Placed inside dry walls, linings and suspended ceilings, it absorbs the sound bouncing in the air gap and raises the acoustic insulation of the whole system; it also insulates thermally (λ 0.035 W/mK).
Non-combustible (A1) and vapour-open (μ 1), it is available in 30 and 50 mm thicknesses.