John Sayers' Recording Studio Design Forum Archive

I'm in the process of beginning to caulk drywall that has been installed. After researching on this site and emailing for suggestions, I decided to use OSI-175 Acoustical Caulking.

Today, I was off from work, and just decided to scroll through past pages of topics and posts in this forum. I ran across this post that caught my attention:

http://www.johnlsayers.com/phpBB2/viewtopic.php?t=3104

I read through it and became concerned over what I had bought and the correct way to use it. I will be a first time user of this type of product also. I don't want to run into the same problems as the people did in this topic. I have no problem using acoustic caulking, but I need to be sure I know what I'm doing.

I understand what Rod was saying about the "backer rod", but what about sealing between drywall sheets, between drywall and studs etc. If this stuff "oozes" as it was somewhat stated, will it stay in place if you are squirting it horizontally between 2 sheets of drywall? (where there is very little gap between the 2 sheets)

Maybe this isn't that big of a deal, but from the mess and problems stated in these posts, if there's a better way, I'm ALL for it!!

Thanx
Stan

I bought five cases of that OSI-175 and it worked out really well for me.

There was quite a bit of ooze, but I was able to minimize it by using a better quality gun and taking all the pressure off after squeezing some out. Just have something like a newspaper or paper towel to set it on when you're not actively using it. You'll lose some, but a lot less if you take the pressure off.

In my case, I didn't use backer rod, mostly because of the odd shaped gaps I had to fill. But I probably will use backer rod when I build my "normal" walls and ceiling (i.e., not the beef-up walls I was doing)...

--Keith

Keith,
Did you basically use it like regular caulking? Did it stay put once you squirted it horizontally or vertically?

Sorry... Our posts crossed. I edited my post to answer your question before you even asked it.

Same here I had tubes for days of that stuff. Worked very easy. Dries niceyl easy to wrok with....

Ok...thanx for the info guys!
Stan

Cleans up well, too.

You can read about my experience with my beef-up, including the OSI-175, starting about here.

camistan wrote:Keith,
Did you basically use it like regular caulking? Did it stay put once you squirted it horizontally or vertically?

it works like regular caulk and stays put pretty well.

In my case, I actually used it less like "caulk" and more like "filler," again because of the odd width and shape gaps my beef-up layers left behind. I literally used a putty knife to squeeze it into all the cavities.

If all my existing studs had been perfectly straight and plumb, I probably would have been able to have applied it just like regular caulk.

Hopefully that makes sense... If not, follow that link to my thread and you'll see what I'm talking about.

--Keith

sharward wrote:In my case, I actually used it less like "caulk" and more like "filler," again because of the odd width and shape gaps my beef-up layers left behind. I literally used a putty knife to squeeze it into all the cavities.

Well we definitely had that in common. I had some oddities and stuffed a bunch of holes with it. even some of the seams .... Bottom line, that room was devoid of sound entering or leaving.......