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Green Glue is a revolutionary new soundproofing compound that approaches the issues of soundproofing from an entirely different angle. Green Glue is no a sound blocker or a sound absorber of a sound diffuser, but rather it is a sound deadener or damper. I know, I can hear the wheels in your head turning. What is a sound damper? Well, I'm glad you asked. A sound damper is and agent or material that actually stops the transmission of sound through two rigid hard surfaces such as drywall or soundboard.

Here's how it works, when Green Glue is applied to a second sheet of drywall and then sandwiched in between the existing drywall and this new piece of drywall. The Green Glue will actually change the resonant frequencies of both layers of drywall and will stop their ability to transmit sound.
So are your confused yet. I have a very simply analogy of how the Green Glue actually works. I got this from a customer who was well attuned to the properties of Green Glue.
If you will, visualize your wall as being a drumhead. Now you have one of your kids beat the drum with a drumstick. The drum will resonate loud and clear, as there is nothing restricting the transmission of the sound as the drumstick strikes the drumhead. Now let take that same drumhead and as the child strikes the drum you place your finger on the drumhead. What happens now? The drum is now restricted and cannot transmit the sound or will only transmit a fraction of the sound that it did when the drumhead was unrestricted. I hope this little analogy has shown you how the Green Glue acts as a sound damper when applied between two layers of drywall or soundboard. I sure put Green Glue in perspective for me and I have been in the soundproofing industry for years.
Now knowing that the Green Glue is not a blocking agent or and absorber, it is now absolutely essential that is cover every square inch of the drywall layers. In other words, once you screw the second layer of drywall over top the first with the Green Glue sandwiched in between, it makes no difference that the screws are making a connection between the stud structure and the drywall layers. Why you ask? Because we are damping or deadening the drywall layers, he Green Glue is not a soundproof barrier.
Green Glue fills a very critical gap when soundproofing. It precludes you from having to remove your existing drywall. As far as I am concerned, the less demolition I have to do, the better.
Lastly, Green Glue also works remarkably well when applied

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