4specs.com    4specs.com Home Page

Water-White Methacrylate Lacquer Log Out | Topics | Search
Moderators | Register | Edit Profile

4specs Discussion Forum » Product Discussions » Water-White Methacrylate Lacquer « Previous Next »

Author Message
Jerome J. Lazar, RA, CCS, CSI, SCIP
Senior Member
Username: lazarcitec

Post Number: 898
Registered: 05-2003
Posted on Wednesday, October 10, 2012 - 11:55 am:   Edit PostDelete PostPrint Post

We reference this product as a separation between aluminum and cement based products (per the building code), a client has asked for a list of recommended manufactureers - does anyone know of manufacturers of this product that can be applied to aluminum?
John Bunzick, CCS, CCCA, LEED AP
Senior Member
Username: bunzick

Post Number: 1453
Registered: 03-2002
Posted on Wednesday, October 10, 2012 - 12:14 pm:   Edit PostDelete PostPrint Post

Does the building code call for this particular product?! or just a separation. I'm wondering where the requirement for this specific lacquer came from.
Jerome J. Lazar, RA, CCS, CSI, SCIP
Senior Member
Username: lazarcitec

Post Number: 899
Registered: 05-2003
Posted on Wednesday, October 10, 2012 - 12:17 pm:   Edit PostDelete PostPrint Post

John - 2010 Edition of FBC 2003.8.4.4:
Aluminum surfaces in contact with lime-mortar, concrete, or other masonry materials, shall be protected with alkali-resistant coatings, such as heavy-bodied bituminous paint or water-white methacrylate lacquer.
Jerome J. Lazar, RA, CCS, CSI, SCIP
Senior Member
Username: lazarcitec

Post Number: 900
Registered: 05-2003
Posted on Wednesday, October 10, 2012 - 12:18 pm:   Edit PostDelete PostPrint Post

John, we prefer to specify bituminous paint, but in some applications bituminous paint is too messy.
Jerome J. Lazar, RA, CCS, CSI, SCIP
Senior Member
Username: lazarcitec

Post Number: 901
Registered: 05-2003
Posted on Wednesday, October 10, 2012 - 12:21 pm:   Edit PostDelete PostPrint Post

John, I researched back to the 2001 Edition of FBC, the same language reappears in each version within the Chapter on Aluminum for sissimilar materials separation.
Ronald L. Geren, AIA, CSI, CCS, CCCA, SCIP
Senior Member
Username: specman

Post Number: 1049
Registered: 03-2003


Posted on Wednesday, October 10, 2012 - 12:35 pm:   Edit PostDelete PostPrint Post

It's a Florida thing--the unamended IBC does not have this requirement.
Ron Geren, AIA, CSI, CCS, CCCA, SCIP
www.specsandcodes.com
Jerome J. Lazar, RA, CCS, CSI, SCIP
Senior Member
Username: lazarcitec

Post Number: 902
Registered: 05-2003
Posted on Wednesday, October 10, 2012 - 12:55 pm:   Edit PostDelete PostPrint Post

As I've said before, Florida Specifications are unique, and South Florida Specifications are insane...but I've been writing them for over 30 years and (knock on wood) said specs have never been named in litigation as a cause for negligence, even though we have prepared specs for hundreds of condominium projects - and the insanity continues.
Ron, I am surprised that aluminum corrosion is not addressed as strongly in the IBC as in the FBC, does not aluminum corrode in other parts of the country?
Ronald L. Geren, AIA, CSI, CCS, CCCA, SCIP
Senior Member
Username: specman

Post Number: 1050
Registered: 03-2003


Posted on Wednesday, October 10, 2012 - 01:19 pm:   Edit PostDelete PostPrint Post

Jerome:

Yes, aluminum does; but the code also doesn't require a lot of things, like water repellent on exposed masonry, mildew-resistant sealant in wet areas, metal door duty performance, etc. All of these affect building performance and maintainability, but are not regulated by the building code.

Some things are just left for the owner to decide. There is a point in which over-regulation may be reached, which is why many jurisdictions don't adopt an energy code, or are slow to adopt the IgCC or they make it optional.
Ron Geren, AIA, CSI, CCS, CCCA, SCIP
www.specsandcodes.com
John Bunzick, CCS, CCCA, LEED AP
Senior Member
Username: bunzick

Post Number: 1454
Registered: 03-2002
Posted on Friday, October 12, 2012 - 02:24 pm:   Edit PostDelete PostPrint Post

I asked because I have usually used other kinds of isolation depending on the condition: peel-and-stick membranes; asphalt building paper; etc. Didn't happen too often because most of the time I was specifying aluminum with a finish.
Jerome J. Lazar, RA, CCS, CSI, SCIP
Senior Member
Username: lazarcitec

Post Number: 907
Registered: 05-2003
Posted on Friday, October 12, 2012 - 02:38 pm:   Edit PostDelete PostPrint Post

iT DEPENDS ON THE THICKNESS OF THE FINISH, AAMA 2605 YES, AAMA 2603 NO, not sure about AAMA 2604 - should be min 0.80 mil thickness to be considered a barrier to corrosion - perhaps someone else can clarify further.
Jerome J. Lazar, RA, CCS, CSI, SCIP
Senior Member
Username: lazarcitec

Post Number: 908
Registered: 05-2003
Posted on Friday, October 12, 2012 - 02:46 pm:   Edit PostDelete PostPrint Post

BTW, my previous comment on aluminum finish thickness is from PCA: http://www.cement.org/masonry/cc_al_frames.asp
Jerome J. Lazar, RA, CCS, CSI, SCIP
Senior Member
Username: lazarcitec

Post Number: 909
Registered: 05-2003
Posted on Friday, October 12, 2012 - 03:56 pm:   Edit PostDelete PostPrint Post

I've asked the FL PPG Coatings rep to look at the PCA article regarding min thickness of paint, and am meeting with him next week. He suggested using urethane sealant as a separation material.
Jerome J. Lazar, RA, CCS, CSI, SCIP
Senior Member
Username: lazarcitec

Post Number: 910
Registered: 05-2003
Posted on Thursday, October 18, 2012 - 08:15 pm:   Edit PostDelete PostPrint Post

So no one ever answered my original question, Water-White Methacrylate Lacquer manufacturers?
ken hercenberg
Senior Member
Username: khercenberg

Post Number: 341
Registered: 12-2006


Posted on Friday, October 19, 2012 - 09:49 am:   Edit PostDelete PostPrint Post

See Page 22 of http://cedecor.com.ar/wp-content/uploads/2011/05/Elvacite_Brochure-06-02.pdf for an example of what's available. you might want to call the folks who make this available as well - http://www.sigmaaldrich.com/catalog/product/aldrich/474037?lang=en&region=US

I'm a bit surprised that methacrylate (it's a form of modified acrylic) is listed as a preferred method of blocking galvanic action. Historically, it wasn't considered very good for that purpose but with the elimination of zinc chromates and similar coatings due to ecological concerns, perhaps it's good enough. Resorting to AAMA 2605 just to prevent corrosion due to contact between dissimilar metals might be a little excessive, but it sure does make a good case for defaulting to that option when selecting finishes on aluminum.

Add Your Message Here
Post:
Username: Posting Information:
This is a public posting area. Enter your username and password if you have an account. Otherwise, enter your full name as your username and leave the password blank. Your e-mail address is optional.
Password:
E-mail:
Options: Automatically activate URLs in message
Action:

Topics | Last Day | Last Week | Tree View | Search | Help/Instructions | Program Credits Administration