25mm Rockwool RWA45 Acoustic Sound Insulation Slab is a multi-purpose acoustic insulation solution that is suitable for a wide range of building applications. It is certified as A1 non-combustible in accordance with BS EN 13501-1, achieving the highest possible level of fire performance. 25mm Rockwool RWA45 slabs have a density of 45kg/m3, giving them excellent acoustic properties and making them ideal for use in separating floors and walls. These 25mm Rockwool insulation slabs are resin bonded and cut to 1200mm x 600mm, which means they fit easily between most standard stud partitions and floor joists. Sometimes referred to as Sound slabs due to their acoustic properties, 25mm RWA45 Slabs are the most popular acoustic insulation solution on the market.