Green Glue is a new liquid material which the makers claim substantially reduces sound by converting the audio vibration into heat. It’s deployed by sandwiching it between two layers of thin material like drywall or plywood. The concept sounds absolutely fascinating, especially for city dwellers who have a permanent battle with noise pollution, and I’d love to know whether it works as advertised. Their website contains an impressive amount of information, but that’s not everything of course.
How does Green Glue 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… 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.