Question 1

How many sq ft coverage per gallon and does it work on sheetrock for music rooms, etc..

Accepted Answer

Suggested spread rate is 75 - 100 square feet per gallon.
It will "work" but it depends on what you are trying to achieve. This product is primarily designed to deaden sound caused by vibration. This would be things like machinery, speaker cabinets, auto panels, walls where sound is coming from the other side, etc.
For sound caused by frequency within a room we have the Acousti-Coat. That product acts like a sound 'sponge' within a space and deadens echo and harsh 'tinniness'.

Question 2

I have an old house (1805) with a exposed heating duct floor to ceiling  that sound travels clearly. Would this work ?

Accepted Answer

It would be a good part of a sound proofing process but if you don’t cover the duct work with a panelized insulation board or Sheetrock first then use this paint won’t help. You can secure either Sheetrock or panelized insulation to the duct work with self tapping screws.
This will give you a better end result.

Question 3

How do you apply the coating? Can you use a brush or roller? Can you use a sprayer?

Accepted Answer

Brush and roller. No way to spray it, it's full of sand. Brush the corners, roll the wall, because you constantly have to mix it around.  Depending on your texture, 3/8 or 1/2" roller. You want thick coats. You also want to kind of spread the sand around, it's almost like stucco.

Question 4

Sc#1000 or acusti-coat is best?

Accepted Answer

It depends on the situation and the type of sound to be reduced. 
Acousti-Coat is mostly a sound 'sponge'. It absorbs sound from the source side. Think of it as lowering echo and tinniness in large rooms or spaces with many hard surfaces (tile floors, glass walls, etc).
SC 1000 reduces sound caused by vibration. A metal housing of machinery, for example, or noise from adjacent rooms.

SC1000, Sound Deadening Coating - 5 Gallon

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