Mass Loaded Vinyl (MLV) is the perfect material for use as a sound barrier on walls and ceilings. Mass loaded vinyl is a thin but very dense rubber-like material. It is flexible and heavy which are properties that enable fantastic soundproofing solutions. It is non toxic and is the best alternative to Lead materials for soundproofing.
MLV adds great STC values to any wall or ceiling by adding heavy mass. It is great for blocking frequencies from 4000 Hz all the way down to 125 Hz.
