Rockwool Sound Slab provides effective thermal insulation, fire resistance and acoustic performance in all framed areas of the building. The flexi edge allows the product to be tightly fitted between timber and metal frames, without the need for cutting or waste. The structure of the fibres in Rockwool Sound Slab make them ideal for use as a sound absorber, with characteristically high coefficients over a wide frequency range. All Rockwool stone wool insulation repels liquid water due to its fibre orientation and the presence of water repellent additives. Relying on entrapped air for its thermal properties, Rockwool Sound Slab does not contain (and has never contained) gases that have an ozone or global warming potential.