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Robin E. Snyder
Senior Member
Username: robin

Post Number: 579
Registered: 08-2004
Posted on Wednesday, November 12, 2014 - 04:33 pm:   Edit PostDelete PostPrint Post

uses, and pros and cons, of non-skinning versus skin-forming acoustical sealant?
Wayne Yancey
Senior Member
Username: wayne_yancey

Post Number: 705
Registered: 01-2008


Posted on Wednesday, November 12, 2014 - 06:07 pm:   Edit PostDelete PostPrint Post

Acoustical caulking is non-elastomeric. Should be non-skinning and remain permanently flexible to adhere to sides of joint but still permit some flexion (say less then 5%).

Pros: Non-skinning, permanently flexible; does not turn hard and loose adhesion or fail in cohesion.
Cons: Permanently sticky to the touch.

That's all I have to say about that

FG
Lynn Javoroski FCSI CCS LEEDŽ AP SCIP Affiliate
Senior Member
Username: lynn_javoroski

Post Number: 1914
Registered: 07-2002


Posted on Wednesday, November 12, 2014 - 06:15 pm:   Edit PostDelete PostPrint Post

permanently sticky = dust and dirt collecting
ken hercenberg
Senior Member
Username: khercenberg

Post Number: 846
Registered: 12-2006


Posted on Wednesday, November 12, 2014 - 06:17 pm:   Edit PostDelete PostPrint Post

Correct. Only use in concealed applications. Use the skinning stuff in exposed applications.
Wayne Yancey
Senior Member
Username: wayne_yancey

Post Number: 706
Registered: 01-2008


Posted on Wednesday, November 12, 2014 - 06:20 pm:   Edit PostDelete PostPrint Post

It shouldn't be left exposed to view. It is usually concealed behind a base or eschutcheon or above a ceiling in a plenum or behind a control joint in gypsum board. If the caulking must be both fire-rated and acoustic, fire-rating trumps all. Fire-rated are usually reddish color.

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