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| Last modified: July 23, 2008 ACOUSTICAL GOO and MAGNESIACORE Sound Control Acoustical Goo is available from Magnesiacore Inc. to amortize and isolate sound in acoustical attenuation projects. Based on independent laboratory testing for acoustical material 9mm (3/8") magnesiacore can be considered better than 16mm (5/8") gypsum board in an equal acoustical design for interior ceilings and walls. However, in additions to magnesiacore being also very suitable for floors and even exteriors (which gypsum board is not good for), magnesiacore provides better acoustical performance by refracting sound energy waves. Plus unique designs are made possible such as stapled magnesiacore to magnesiacore avoiding short circuits from screwing face sheets to framing work that permits sound to travel through structures. ACOUSTICAL ASSEMBLY TESTS per ASTM E90 (5/8") ~16mm paperfaced gypsum drywall
For existing rooms, simply applying a layer of magnesiacore (in any thickness) over acoustical goo over existing walls, ceilings and floors provides remarkable acoustical improvement to your enclosed environment. Making rooms quieter, removing echo and reverberations, and letting you hear sounds undistorted. Either by fully wall boarding entire rooms or by applying distinct panels to walls, immediate improvements are seen in the acoustical properties of the room. Whether it is a Recreation Room, Garage, Home Theatre or any other home or other building location where a quiet room is desired or when LOUD rooms need to be silenced to live and work in quieter surroundings. Magnesiacore brings to you the very best acoustic wall and floor system to use in a simple design. Easy to put together without great expense and requires low skill levels to do properly. For professional sound consultants and acoustic trade contractors we offer improved materials and innovations to help create quieter spaces in today's more noisy urban environments.
Acoustical Goo is a sound Isolating Dampening Compound of the class of materials known as viscoelastics. Acoustical goo does not harden but remains gooey between two layers of material to dampen sound by consuming the energy in the sound waves as it travels between layers of magnesiacore. The dampening material and two magnesiacore sheets function together like a shock absorber to amortize the sound traveling through them.  How does it work?Constrained layer damping, sometimes referred to as CLD, a dampening material sandwiched between two stiff materials are sheared rigid. With Acoustical Goo sandwiched between two layers of magnesiacore dampening occurs when the viscoelastic center is sheared. When bent, shear forces pull and stretch the dampening material. The unique polymeric construction of Acoustical Goo efficiently converts the mechanical energy to heat. The vibration energy is not only isolated, it is dissipated and transformed and thus removed. Magnesiacore with much higher density and elasticity is superior to other construction boards to work with Acoustical Goo to provide the best combination for isolated mass dampening. Acoustical Goo is formulated specifically to neutralise sounds traveling in building walls, floors and ceilings. As refractory material magnesia molecules respond to energy of sound waves much like other radiation by refraction to enhance Acoustical Goo ability to dampen and neutralise the energy of the sound waves as they travel. Attractive flooring applications that create sound management in office, commercial and residential environments by the "Isolated Mass Dampening of Sound Waves" thus consuming acoustical energy rather than reflecting it.
Details for Walls, Ceilings and Floor Construction:
Recommended Acoustical Goo coverage is from 1 to 3 tubes per 4' x 8' panel (122cm x244cm) in uniform random layout (see figures below for methods)
 to go  from  to this  NOTE - Acoustical Goo takes approximately 30 days to set and reach optimum consistency to neutralize sounds waves. Although sound dampening occurs immediately by the system it will increase dramatically over time reaching its maximum dampening performance when fully set. A key feature of the above wall / floor assembly is the reduction in number of screws and fasteners between the face wall panel (that air born sound hit) and the structure (studs). Reducing the number of fasteners to no more than one every 16" (40cm) apart reduces the number of "short circuits" that sound can take after hitting the face wallboard. This method permits Acoustic Goo to function better between two sheets since magnesiacore is stapled together separately from the studs. For additional information or questions please contact us by email 24/7.
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Uniform random coverage of Acoustical Goo gives optimum performance across all sound frequencies
Leaving patches uncovered using the same amount of Acoustical Goo results in thicker film when two sheets are together. This slightly improves low frequency behaviour at the slight expense to higher frequency performance 
