Any Green Glue Users care to comment?

[Jamz]

I've been attracted to the idea of using Green Glue. However, we decided not to use it while building our walls because there didn't seem to be enough actual feedback on the "real" effectiveness of the product. The guy that designed my room read the specs and felt that other products could yield a similar result at a fraction of the cost.

I may have the opportunity to use Green Glue on a much smaller project...an amp iso box. Unfortunately,it appears you can only buy this expensive glue by the case.

So...any users out there willing to tell their tales of amazement regarding this product?
Also, if anyone has a few tubes left over I might be interested in purchasing them.

Thanks.
Jim

[DSD_Mastering]

I used 27 cases on my build. We even used it between every single joint and subfloor.
A case is only good for 4-6 sheets of drywall.

Sorry.... none left over...

Regards,
Bruce

[gainstages]

the stuff works good. I actually just completed my build with QuietGlue, which is very similar. it was actually a little cheaper, and there was no nasty smell.

i didn't use it between all joints, but i did use it between all layers, and I'm pretty dang pleased - from everything i can tell, it's helped greatly.

[Jamz]

How bad is the smell...toxic, just nasty or both?
How long did it take to cure?

[Eric Desart]

If interested,

Recently there was a discussion about the comparison of Green Glue and Quiet Glue.

Quiet Glue vs. Green Glue - I've done a search here on this subject but cannot find opinions or comparisons. If you know of a thread please direct me to it. Quiet Glue: http://www.quietsolution.com/html/quietglue.html Green Glue: http://www.greenglue

The product clearly does not perform the same.
Measurements are executed by Green Glue to compare the product.

Functionally Green Glue seems cheaper.

I've used Green Glue on several occassions. It's a good product.

[Eric Desart]

Originally Posted by Jamz

How bad is the smell...toxic, just nasty or both?
How long did it take to cure?

It isn't toxic.

Curing time is very long. You can judge the final effect only after weeks.

[bpape]

I believe Audio Alloy specs 30 days to fully cure. It's effectiveness improves over time as the curing process progresses.

I've spec'd it for a lot of rooms and I've not had any complaints. I know I'll use it on my next room.

Bryan

[jwl]

Green Glue is very effective, and they are good members of the acoustics community as they have sponsored extensive testing on their site:
Soundproofing Topics

I agree it's expensive, but it does work well. If you have the space and labor power, extra layers of sheetrock may work as well.

[nosebleedaudio]

Originally Posted by jwl

Green Glue is very effective, and they are good members of the acoustics community as they have sponsored extensive testing on their site:
Soundproofing Topics

I agree it's expensive, but it does work well. If you have the space and labor power, extra layers of sheetrock may work as well.

I agree these guys have more detailed info on wall contruction than anyone I know.
The thing that gets me is how different the numbers can be from different companies on the same material. Such as the limp mass, one company states a STC of 51, and the Green Glue co. state the same material as a STC of 45. That's a pretty big difference...

[gainstages]

Originally Posted by Eric Desart

If interested,

Recently there was a discussion about the comparison of Green Glue and Quiet Glue.

Quiet Glue vs. Green Glue - I've done a search here on this subject but cannot find opinions or comparisons. If you know of a thread please direct me to it. Quiet Glue: http://www.quietsolution.com/html/quietglue.html Green Glue: http://www.greenglue

The product clearly does not perform the same.
Measurements are executed by Green Glue to compare the product.

Functionally Green Glue seems cheaper.

I've used Green Glue on several occassions. It's a good product.

I didn't mean to say it was the same, only similar. not that i'm a spokesman for them or anything, but i get headaches easily and the fact that it has really no smell to it at all was a plus. additionally, i believe that they consider their product to be fully cured within 24 hours, where as the green glue takes longer, all that really means to me is that i can better assess the full impact of the products effect on my room more easily/quickly.

don't get me wrong, i think green glue is great

[Jamz]

So do you guys think the additional cost for Green Glue is warranted over Quiet Glue?

My walls are up. I'm now thinking about an iso booth for guitar cabs.

[Doublehelix]

I used GG in my wall construction as well, and the results have been fantastic! I have nothing to compare it to however, so I cannot say for sure that I would not have been as happy without it. I think that the entire process adds up to sound transmission reduction, and I am very glad that I did not cut any corners as my room sounds fantastic (and quiet!!!)

[Eric Desart]

Originally Posted by Jamz

So do you guys think the additional cost for Green Glue is warranted over Quiet Glue?

I'm not thinking that ......, official lab tests proved it did.
Only 25% Green Glue coverage beats 100% Quiet Glue coverage. See the thread I linked.
Hence comparing both is a simple calculation.

The other question of course remains: Do you need Green Glue or whatever alternative at all?
It has only sense to strengthen links in a chain, when these chains are the weak links defining the overall insulation.
Strengtening a already strong or stronger link doesn't make the chain as a whole stronger.
Isolation is mainly defined by the weakest link.

And if you don't need the additional isolation, than it's lost money. Hence it depends on your goals and purpose.
Green Glue doesn't improve a studio. Green Glue does improve TL where applied. If sensible and needed it's likely the best related product available.

[nosebleedaudio]

I looked at this material, Green Glue and Quietrock before the last studio I built and desided to go with the old standard stuff that has worked for years.
Something that's available down the street when you run out is a time saver.
I did some tests after the walls were built and they exceded my expectations.
So the old standard staggered stud or double wall works very well.

[Eric Desart]

Originally Posted by nosebleedaudio

So the old standard staggered stud or double wall works very well.

Id does work, since enormous amounts of walls are build without GG fulfilling their purpose.

But we can't deny that Green Glue, improves whatever principle one builds his walls on by increasing the internal damping by use of CLD (constrained layer damping). This internal damping and its influence on TL is a for ages known and described physical principle.
Only before Green Glue, there wasn't much available which could influence this phenomenon in a manner significantly enough, to make such an application worth while.

A real life story (I entered before at John Sayers):

A story:

An old building (+/- 100 years).
Destructive testing not allowed, or to be avoided due to architectural value and limitations.
Nobody has an idea about the exact structure.
I have a ceiling with some strange extremely hard board (looks like cement board, but how old?).
When I knocked on it, that ceiling and a lot with it starts singing at +/- 42 Hz (more like a gong):

BOOOOOIIIIIIIIIIIIIIIIIIIIIING.

I didn't want to demount that ceiling. Some small drilled holes and testing showed a very large cavity (around 50 to 60 cm, at least on the tested spots) without any absorption.
No idea if that cavity went much further than the boundaries of that room (it went further on 2 sides, but how and where, and outside drilling holes was no option). We felt joists, but couldn't imagine well how that construction was build.

I wanted to test GG here, not sure (even only partly believing) it could help me out here. Hence we searched for joists within the room boundaries, and mounted one 12.5 mm gypsumboard with GG.

About 7 to 10 days later (can't remember exactly). I knocked on that (high) ceiling. It was a bit better but still:

BOOOIIIIIIIIIIIIIIIIIIING.

I thought "damned, not worth the trouble and energy", searching for another way.
+/- 1 month later, I tried again, just for the fun of it, and because others told me they had the impression it was improved. There was no way anymore I could trigger that resonance (and I really tried). The result:

BOING.

This was the first time I was directly and audibly confronted with the real-life effect of that long curing time.

But I still agree: GG is only another and additional means to improve stuff. If one doesn't need it it has no sense to apply it. It's still a relative costly application.
But it's very good in what it sais it does.
And it makes difficult things as preserving TL on Window frames, door frames and all these other risky weak points very forgiving.