acoustic calk, etc questions. - AVS Forum
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post #1 of 9 Old 11-03-2004, 04:55 AM - Thread Starter
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Hello, all. I am getting ready for drywall. Origianlly, I was going to put drop ceiling, but it seems that drywall ceiling is back in. I have some questions.

1. Where can I get acoustic calk? Local HD in my area did not have them. Also, I need to calk corners before tape/mud, right?
2. For a subwoofer, what kind of cables do I need to run? Are they different from one sub to another?
3. For IR receptor (put in front to be repeated in the rack in the back wall), what kind of wires do I run?
4. Any recommendation on wire running?

Thank you very much.
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post #2 of 9 Old 11-03-2004, 05:57 AM
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Acoustic Caulk

As far as your caulk, I would recommend using an "Acoustical Sealant". Most other caulks either dry hard or shrink over time. Causing an opening for flanking sound. Acoustical sealant is non-hardening and flexible and doesn't shrink. If you're having problems trying to find it, search for your local supply houses of drywall, insulation or steel framing supply places. Basically where the contractors go. There are several different brands to choose from...eg: Boss, Grabber, Tite Bond, etc.

Cost and size. Big tubes only need to be changed a third as often. At about $5 nowadays for a big fat 29-oz cartridge of OSI SC-175 Acoustical Sealant, that's equivalent to under $2 for a 10.1 oz tube. And you don't have to go crazy looking if you just call a local drywall supplier (not home improvement warehouse). They probably order from OSI routinely. Get a case or two and caulk away.

Eric Desart Says: Butyl acoustic caulks will also absorb vibration, so they are best

Rod Gervais says: GE Silicone II is the Mercedes of caulks, but if you only have a Chevy budget, OSI SC-175 will get you there too.

Lepage PL Acousti-Seal $4.97 CDN / 850 ml ($3.75 / 29 oz, or 13 cents US per oz)
http://www.lepageproducts.com/produc...id=69&plid=260
http://www.lepageproducts.com/produc...y.asp?catID=26
unhappy mess: http://www.johnlsayers.com/phpBB2/viewtopic.php?t=3104

OSI SC-175 $4.49 US / 29oz (15 cents US per oz)
http://www.84lumber.com/stores/zip_search.asp
http://www.osiproseries.com/adhesive...sound-sealant/
http://doityourself.com/store/specialtycaulks.htm
http://www.osiliterature.com/IMAGE/PDF/sO11175.PDF

USG SHEETROCK® Brand Acoustical Sealant ($4.66 / 29oz, or 16 cents US per oz )
http://www.capmat.com/images/bulletin_8_5_04.htm $4.66 / 29oz
http://www.usg.com/IC/products/Sealants/Acoustic.asp
http://literature.usg.com/pdf/J678.pdf
http://www.allchurchsound.com/ACS/ed...torletter.html (review)
available at whitecapdirect.com
"I just picked up a 29 oz tube of USG SHEETROCK® Brand Acoustical Sealant for $5.99 at Midtown Lumber & Hardware in New York City"

Mono acoustical sealant $1.89CDN / 10oz ($7.30US / 29oz, or 25 cents US per oz)
Price from Canadian Tire.

Soundsealant 29 oz. $7.50 US (or 26 cents US per oz)
http://www.acousticalsolutions.com/p...ants/caulk.asp

Owens Corning Acoustical Caulk $2.89 / 10oz from special order from Lowes (29 cents US per oz)

Grabber® Acoustical Sealant GSCS $13.50 NZ / 850ml ($8.77 US / 29oz, or 30 cents US per oz)
http://www.grabberman.com/acousticaldata.htm

GE Silicone II $5.25 CDN / 300 ml ($4 / 10oz, or 40 cents US per oz)

Titebond® Acoustical Sound Sealant $17.98 US / 29oz (or 62 cents us per oz)
http://www.amistorefront.com/detail.aspx?ID=285 $17.98 US
http://www.acousticalsolutions.com/p...ants/caulk.asp $7.50US.

$17.98 / 29 oz (62 cents s per oz)
http://order.americanmicroinc.com/cg...croinc/AS.html

QuietSeal QS-350 29oz Contractors Tube $19.95 US (or 69 cents US per oz)
http://www.quietsolution.com/constru...adhesives.html

Auralex StopGap Acoustical Sealant ($19.95 / 29 oz, 69 cents us per oz)
http://www.auralex.com/acoustic_seal...nt_stopgap.asp
http://www.bhphotovideo.com/bnh/cont...rch&Q=&ci=8390

S.T.O.P. Noise
http://www.acousticalsurfaces.com/se...alant.htm?d=18

Boss 824 Acoustical Sealant (Disavowed by Knightfly)
http://www.bossproducts.com/BossProd...alog.asp?cat=2
bottom of the page/

"The Boss seemed to dry up and shrink a little bit, so I had to go back around and fill in some spots. I didn't have that much of a problem w/ the Grabber or Titebond, but I've used only a couple tubes of the Titebond so far. It's all easy cleanup though. No oily silicone stuff. "
Aaron
http://www.johnlsayers.com/phpBB2/vi...&p=14791#14791

http://www.recording.org/postp172099.html#172099

http://www.recording.org/modules.php...=171285#171285
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post #3 of 9 Old 11-03-2004, 06:03 AM
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Quote:
2. For a subwoofer, what kind of cables do I need to run? Are they different from one sub to another?
For runs under 6' without obvious electrical noise problems the subwoofer cable probably doesn't matter.
There are lots of threads on this site about how to make subwoofer cables using RG59 and Belden 1694A.
I was unable to find Belden 1694A when I made my cables, because I was spelling it wrong (Beldon). It turns out that Belden has an office down the street from me. Ahem.
Anyway, I made mine out of RG6 from HD with some gold tipped ends from Radio Shack and a soddering iron.

Quote:
4. Any recommendation on wire running?
http://www.roger-russell.com/wire.htm - talks about distance vs guage vs ohms of speaker (as well as wire comparison).

For my recent experiences trying to decide on wire guage, please see
http://www.avsforum.com/avs-vb/showt...20#post4474920

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post #4 of 9 Old 11-03-2004, 06:23 AM
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Yes. You should caulk all of the joints before taping and mudding. In mounting the drywall, make sure you alternate walls/ceiling mounting. i.e. Ceiling, left wall, right wall, front wall, back wall, ceiling, left wall, etc. This provides no direct escape route where only caulk is blocking by having the seams form 2 'L's. It's a little thing and you still need to caulk but it does provide some benefit.

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post #5 of 9 Old 11-03-2004, 02:15 PM
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What about those of use setting the ceiling on top of the walls? How do we keep from having a space that is caulk only in that type of arrangment?
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post #6 of 9 Old 11-04-2004, 04:34 AM
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The sequence I described has the ceiling supported by the walls. Not sure what you are asking.

I am serious...and don't call me Shirley.
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GIK Acoustics

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post #7 of 9 Old 04-29-2005, 08:37 AM
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From Bobs list above:

"GE Silicone II $5.25 CDN / 300 ml ($4 / 10oz, or 40 cents US per oz)"

Is this an actual acoustical sealant?

The tube does say "Permanently Flexible" but nothing about acoustical properties and I know that it will dry but appears to remain somewhat ply-able in its dry state.

Another I found was Dynaflex 230 (Indoor/outdoor) by DAP. Again no mention of acoustical properties but it does say that it is "Permanently Flexible" withstanding up tp 50% total joint movement. Also it contains Butyl Benzyl Phthalate, if that means anything.

Does this stuff sound good?

Regards
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post #8 of 9 Old 04-29-2005, 08:51 AM
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Try to find the USG Acoustical Sealant in your area by contacting one of their sales reps . For a huge 29 oz tube it ran about $3 something here in Cincinnati. It'll be a lot cheaper than anything you'll find at HD or Lowes. I went through 3.5 cases (12 tubes/case).
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post #9 of 9 Old 04-29-2005, 09:45 AM
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I live near the Toronto, Canada area. Apparently USG acoustical sealant is not sold in any retail stores around hear. Not sure why.

Thanks
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