Quiet Glue vs. Green Glue

[Glide]

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.greengluecompany.com/

Quiet Glue is about $30 per case cheaper than Green Glue. Is it the same stuff, or is there a reason why someone should pay $30 more per case for Green Glue?

I am about to purchase 6 cases and $180 in savings could be applied to some bass traps or diffusors.

Thanks.

[Rod Gervais]

I do not see actual test data for this product similar to that which has been provided for Green Glue - shy of that I cannot comment on it's effectiveness.........

I would still have to recommend GG to my clients.

Rod

[andrebrito]

The only data I see from QG is http://www.quietsolution.com/QuietGlue_315_dsheet.pdf which has a chart of TL there and damping factor 0.45-0.65 (do not understand why they did not specify a single number). Comparing that chart with http://www.greengluecompany.com/imag...049_Report.pdf
it seems GG is a bit better.

Maybe it is equivalent but without more data from independent labs (preferably from the same lab) one cannot aswer. Test results differ a bit even when done in independent labs. I had a picture of different results from several european labs for the same type of construction and the differences between them where sometimes significant :shock: :shock:

PS - I have found some links here

http://pcfarina.eng.unipr.it/Public/Papers/093-IN96.PDF
http://pcfarina.eng.unipr.it/Public/Papers/091-EG96.PDF

http://www.acoustics.hut.fi/asf/bnam...papers/o16.pdf

[eric_desart]

I have the silent suspicion that both materials are the same and resulting from some kind of agreement or license between both companies.
Hence that only name, marketing and target group differ or complement.

Brian could confirm or deny that, but if he can commercially I don't know.

Eric
.

[Glide]

I sorta think the same thing eric, but the quiet glue would not have the green food coloring and that would certainly equal at least 1 stc point, you think?

:)

[eric_desart]

Glide,

I once wrote more extensive about "the why I think that" (at John Sayers, but can't find the post back) after analyzing the text on the quiet solutions site and knowing a bit the history of the stuff and business in general.

But if there is some kind of agreement, with GG as the main designer/owner and they choose this path, none of both will officially make that public.
The only way to know for sure is looking at the stuff itself.

I can be wrong of course but often my belly informs me well. I read the lines and my belly reads between them.

Now Brian (the designer and technical manager of GG) can always correct me of course, and I trust they follow the most relevant forums in the background.
I should like to know for sure either.

Have you seen the applied (not sold) quantities referred since 2003 on the quiet solutions site? These numbers and date doesn't fall just out of the blue.

Eric

[Rod Gervais]

I have the silent suspicion that both materials are the same and resulting from some kind of agreement or license between both companies.
Hence that only name, marketing and target group differ or complement.

Brian could confirm or deny that, but if he can commercially I don't know.

Eric
.

Eric,

yes he can comment - and will be here shortly to do so.

Sincerely,

Rod

[avare]

There is a very long thread here comparing the two products. Interestingly, Rod was the last poster on it. :D

Sticking like glue to knowledge:
Andre

[eric_desart]

Andre,

That's a very good link I didn't know about and answers/corrects my question/doubts.

Rod,

I assume you contacted Brian, and that's a very good initiative. Thanks for that.

It's good that Brian will provide some comparative data here, and even better that he puts that on the Green Glue site, in the same manner that GG compares GG with other solutions.
That way this comparison is also accessible for competitors to see. If nothing happens it only enhances the validity of the comparison (if no official measurements are involved. I personally always tend/tended to believe and support/defend Brian's objectivity and scientific attitude, but it's still commercial stuff.)

Thanks guys.
This is useful stuff.

Eric

[Brian R]

Hi all,

I had a bit of trouble logging in, but I got it worked out.

We haven't updated the website in some time, but we recently hired a new web guy, and the entire thing will get an overhaul. Its possible that like many of our pages, this one has errors or type-O's and the like, but a comparison is shown here:

http://www.greengluecompany.com/gree...ampingGlue.php

I have the reports identifying QuietGlue as well (in that report we opted to not name a brand, as we have never done so).

The situation is complicated by the fact that we have attained, via commercial purcahse by the contractors from Quiet Solution, two distinct forms of their product. To the best of our knowledge, QS never announced a change to their product or their marketing. Why the two rather different versions, we don't know. Again, both versiosn were purchased in tubes with the same basic marketing stuff they have on their site now. We will run a test in January on newly purchased QuietGlue to see which version is currently on the market. Quiet Solution could certainly answer better than we what the situation is with their product.


But in any case, we have these data's from a NVLAP certified lab (same wall/studs/insulation/thickness of drywall/#of drywall layers, etc.). This is a 2x4 wood stud wall, 24" OC, R13 insulation, double 5/8" on each side

Reference wall (no glue)= STC 45, OITC 30, Rw+Ctr 33, Tennekes 26
QuietGlue (type A) = STC 45, OITC 33, Rw+ctr 36, Tennekes 29
QuietGlue (type B Test 1)=STC 50, OITC 35, Rw+Ctr 39, Tennekes 30
Green Glue = STC 55, OITC 39, Rw+Ctr 44, Tennekes 34
50% coverage Green Glue = STC 52, OITC 38, Rw+Ctr 42, Tennekes 32
OSi Drywall Adhesive = STC 37, OITC 27, Rw+Ctr 31, Tennekes 24
25% coverage Green Glue = stc 51, OITC 35, Rw+Ctr 39, Tennekes 31

Test reports for all of these are available OR will be available the 1st or 2nd week of January (we have a large chunk of test reports forthcoming from the lab :shock: ).

So official data is available to back up all of the above statements. All tests were paid for by GG. I have never seen any test report or formal documentation for a test of QuietGlue supplied by QS, just one graph.

One version of QuietGlue performs much closer to no glue than to Green Glue. The other version offers about 1/2 of the benefits of Green Glue.

using 1/2 as much Green Glue (50% coverage) yields about 70-75% of the benefits of Green Glue. That's considerably less money than QuietGlue, and still notably better performance than either version of QuietGlue.

And for people on a budget, ~25-30% coverage of Green Glue yields similar or better performance than the best of the QuietGlue tests, about 50% of the performance of the full recommended coverage of Green Glue. Thats starting to get awfully economical.

Also, in a 3rd party lab test for just damping properties, the results were these: (all data for 2 pieces of 1/2" drywall glued together)

Damping values for the first 4 modes are reported, all trowel applied for 100% covg

epoxy: .009, .014, .020, .017
OSi drywall adhesive: .008, .014, .014, .014
USG acoustic sealant: .016, .034, .057, .086
GE Silicone: .028, .040, .035, .045
Green Glue: .375, .428, .364 (none)
Quiet Glue: .038, .088, .129, .132
Version B of QuietGlue wasn't known to us at the time of tihs test.

The differences in performance here are drastic. Beyond differences in airborne sound performance, things like flanking noise attentuation and impact noise will be strongly affected by damping values.

All that will be onto our new site, along with very apples to apples comparisons of GG on steel, wood, staggered studs, and some other walls like RC and all.

Alot of other R&D work going on over here and keeping me away from the forums and locked up with some other R&D types all day. The most interesting of these, perhaps, is a new underlayment for floating floors that exhibits basically no MSM. It has no effect on the location of MSM thats positive or unexpected, but it shows basically no dip at MSM in terms of TL.