acoustic sealant: pecora ac-20 ftr

Anyone heard of this? A place in town carries it and Tremco. Here's a pdf about pecora ac-20 ftr which includes 'technical data': http://www.pecora.com/downloads/specdata/AC_20FTR.pdf Here's a quote from it:

Used as an acoustical sealant, AC-20® FTR reduces sound transmission in partition systems to maintain specific STC values by sealing spaces around cut-outs and at perimeters of partitions. The sealant cures to a tough rubber to form a long-lasting acoustical seal.

Sounds a little vague. Anyone heard of it? The guy at the place mentioned that he sells way more of it than he does Tremco. I'm not feeling all that jazzed about using the Tremco. Thoughts? Thanks.

sounds more like you want the AIS-919 acoustic caulk although the other seems like a useful product for fire stops. if you're looking for just sealing via caulking - most non-hardening 25-year (or longer) caulks will work.

I'm looking to seal gaps with this and backer rod, gullfo. In a first layer of beef type situation. I have a case and I'd rather not open it if it's deemed to be bogus. Thanks for any input.

i don't think it's bogus, i think it's intended for fire stop or other more structural bonding than the stuff they sell as acoustic sealant which seems lighter and more flexible so it would be less likely to couple surfaces and be resilient enough to deal with expansion/contraction.

OK. I've found a line on some OSI which seems to be the go-to brand around here. Would you advise I use the water based or oil based? Thanks.

i prefer water based as they tend to have lower VOC.

Thanks gullfo. I actually picked up a couple of cases (the OSI SC-175) and have been using it with much success. For the record, I also discovered that sticking a heating pad in the box (on the lowest setting) allows it to travel out of the tube quite easily during sub-freezing temps (only while I'm actively using it, of course.....not all the time). I read on the box that allowing this stuff to freeze is no good so I've been keeping it in my house when I'm not using it as well.

Where in the Seattle area did you find the OSI-175? I just used my last tube and need a few more to finish. I ordered my first batch from Toolup quite a while ago and I'd rather not mail order again if I can avoid it. OSI's website is rather tedious in searching for local distributors. That is if you don't mind sharing your source :wink:

Of course. http://www.manta.com/c/mm2fx0j/drywall-distributors-inc This seems much cheaper though: http://www.contractorstoolsupply.com/os ... -5650.html

Thanks!

They actually carry Green Glue too. Good news for your studio. Bad news for the ol' wallet.