GreenStuf® ASB SOUND BLANKET® is a range of 100% polyester acoustic insulation products ideally suited for metal stud wall partitions and as an acoustic ceiling overlay in commercial applications. ASB is supplied in rolls pre-cut to fit standard metal stud partition walls set at 600mm centres. GreenStuf® ASB can be used in metal stud partition walls and as an acoustic ceiling overlay for reducing airborne sound transfer. ASB reduces resonating noise in the construction cavity thereby increasing the sound transmission loss of the construction system.