Isolast® 120 Std is a combination of standard plasterboard in class A2*, 12.5 mm thick, and a recycled polyurethane agglomerate with a density of 120 kg/m ³, 10 mm thick, covered with a double layer of non-woven fabric. It is recommended for sound-proofing of walls in public and private buildings, ensuring excellent results on the medium and high frequencies with reduced thickness**. Certification of actual tested solutions for use with walls**.