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Green Glue alternatives
Old 27th January 2020
  #91
Here for the gear
 

May I add something to explain why the Green glue works and why silicone for example doesn't. The principle is called constrained layered damping and applies in sandwich constructions like sheet/green_glue_compound/sheet. It is pretty well illustrated on https://www.ultrafonic.com.au/soundproofing

Even after long time the Green Glue compound retains very low elasticity, which makes it resistant to any movement (vibration) of the two sheets it is applied in between. Low elasticity means it will resist the movement in one direction, but then it will also resist the return movement in the opposite direction. On the contrary, the materials which become elastic (like silicone i.e.) would resist the movement in one direction, but then stimulate the return movement in the opposite direction, thus keeping the whole sandwich elastic, instead of dampening it.
So, every material which would keep very low elasticity in time is suitable for dampening. The materials which become highly elastic (silicone, polyurethane,...) or harden with time (bitumen based materials i. e.) are not suitable.
Old 10th February 2020
  #92
Gear Head
 

I’ve been reading lots in prep for building my studio, similarly coming across GG. But then I saw this YouTube video.

https://m.youtube.com/watch?v=J7Qi42E5I9c

Thoughts?
Old 10th February 2020
  #93
Lives for gear
 
norton's Avatar
Well, the dude has a great pony tail.

But if he’s either doubting the efficacy of gg, or claiming that the published lab test results are false, or refuting the accepted use of gg in critical systems across all building styles....then he’s an idiot

I have no idea who this guy is or what he’s selling, but he is WRONG in his assessment of gg. If he doesn’t know what structural flanking is, he’s not equipped to give acoustic advice.

I was working in one of the labs where gg was exhaustively rested. I saw repeated results that no other similar product could match. It works.

End of story


Pony tail dude’s breakdown is factually inaccurate.

Gg is not an adhesive. It remains permanently flexible as it never fully cures.

The cost per tube is roughly $10. You can use 1 tube per 4x8 sheet and get the same results as 2 .

So the cost per sq’ is about $3. Which is very slightly more than a sheet of Sheetrock. So his price breakdown is also inaccurate.

My thoughts are: great hair, purposeful or willfully ignorant misrepresentation of facts and axe to grind.
Old 10th February 2020
  #94
Lives for gear
 
norton's Avatar
All you need to know:

Dude sells “acoustic foam”.

His main area of expertise appears to be his emphatic and authoritarian style of speaking misinformation as fact.

Last edited by norton; 10th February 2020 at 03:07 PM..
Old 12th February 2020
  #95
Gear Head
 

Thank you for clearing that up for me...! Seems like a good investment,

Next question.. Im in Ecuador, South America... Anyone know of any suppliers of GG in these parts?!?!
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