GLT Products' Vinaflex (FB) Noise Barrier is a flexible, non-reinforced mass loaded vinyl combined with a 1/4″, 1/2″, or 1″ open-cell urethane and other foams. The open-cell design of the foam readily accepts and dissipates sound waves, insuring maximum acoustical absorption. This foam facing also acts as a decoupler, breaking and separating vibrations between the two materials.