Green glue is a product that is made of a special compound that uses the polymeric formula to aid in sound dampening. It is applied sandwiched between two layers of the wall, for the best results. 

It is designed to be used on standard building materials such as concrete, drywall, plywood, MDF and more.

Use of Green glue has been recorded to improve Sound Transmission Class (STC) ratings up to 12 points.