What is Green Glue? Green Glue is a water-based, viscoelelastic damping compound, with performance that is higher than any product of its type. Green Glue has a damping coefficient of 0.5 versus 0.1 for the competitive products. It dampens air and structure borne sound and can be used in virtually any drywall wall or ceiling assembly. Green Glue can also be used in plywood and OSB assemblies. Sound travels as a wave through the air. The waves hit a wall or ceiling and the energy becomes structure-borne. Unless the wall or ceiling material is damped, the vibration will travel through the building framing and exit somewhere else as sound again. |
How does it work? In a constrained layer damping system, sometimes referred to as CLD, a damping material is sandwiched between two other (usually stiff/center of the "sandwich" is sheared rigid) materials. For example, Green Glue sandwiched between two layers of drywall. Damping occurs when the viscoelastic center of the "sandwich" is sheared (see left). When
bent, shear forces pull and stretch on the damping material. Under
these conditions, the unique polymeric construction of Green Glue
very efficiently converts this mechanical energy to heat. The vibration
energy is not isolated, it's dissipated and gone. |
| Soundproofing
has never been so easy ! |
