75mm Rockwool RWA45 Acoustic Sound Insulation Slab is a multi-purpose acoustic insulation solution that can be installed in a wide variety of building projects and applications. It has been designated as A1-non-combustible under BS EN 13501-1, giving it the highest fire rating possible. 75mm Rockwool RWA45 slabs have a density of 45kg/m3, making them ideal for use in walls and separating floors. These 75mm Rockwool insulation slabs have been resin bonded and are cut to 1200mm x 600mm, which means they fit well between standard floor joists and stud wall partitions. Also known as Sound slabs due to their well-renowned acoustic properties, these 75mm RWA45 slabs are the most common acoustic insulation solution on the market.