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FAQs about IEQc4.1 :

Is there a shortcut to the VOC budget method if you have just one product that is used minimally on a project?

Do products applied to the weather barrier need to comply with VOC thresholds?

How do I determine what application my product falls under?

How is VOC % less water determined for aerosol adhesives?

Do grout and caulking need to be included, and if so, what is the application category?

Our project didn't use some common adhesive types, and our LEED reviewer asked about this. Are we supposed to justify not using certain adhesives in our documentation?

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NC-2009 IEQc4.1:Low-Emitting Materials—Adhesives and Sealants

Roofing Adhesives, Sealants & Mastics

I am reviewing a LEED submittal for roofing adhesives, sealants and mastics. 1. I am unsure of the categories each primer. Can you help? 2. The testing info does not tell me whether the products are Prop. 65 compliant. The info I received is letter from the Manf. stating what testing methods were used. I keep pushing back asking for info or a letter that products comply. Does anyone have any recommendations? The roof sub has submitted the following Carlisle products: 1. Sure-weld TP Low VOC Bonding Adhesive - AllowVOC: 250g/l (single-ply roof membrane adhesive) Testing Info: EPA 24 2. CCW 702 Low VOC Primer - "Adhesive specifically designed to promote maximum adhesionof Carlisle 725TR Air and Vapor Barrier to approved substrates." AllowVOC 775g/l (Architectural-Porous) Should be 100g/l (Primers, Sealants and Undercoaters) Testing Info: Product Formulation Calc 3. Carlise Fast Adhesive Box Sets - "Adhesive designed for bonding Carlisle’s FleeceBACK® membranes or insulation to various substrates." AllowVOC 50g/l - (plastic foams) Testing Info: EPA 24 4. Water Cut Off Mastic - AllowVOC 250g/l Testing Info: Product Formulation Calc

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Peggy White
White + GreenSpec
LEEDuser Basic Member
59 thumbs up

Mon, 03/25/2013 - 22:26

This does not answer all of your questions, but... 1. VOC Limits: VOC limits for adhesives and sealants are determined by compliance with levels set forth in the South Coast Air Quality Management District Rule #1168. These SCQMD standards were developed in Southern California are now required throughout California - they also have been used as the standard for LEED. Labeling in California typically indicates compliance with 'Rule #1168'. 2. 'EPA 24': Since other States may not have the same product labeling as California, the method for determining VOC levels is to require that adhesives and sealants "comply with the following limits for VOC content when calculated according to 40 CFR 59, Subpart D (EPA Method 24): xx g/L." i.e, this ensures that the product has been properly tested for compliance with Rule #11168 and is not just random marketing lingo. "Product Formulation Calc" sounds a bit off to me - you might ask how the VOCs in those products were actually tested. Prop 65 - this may help: "Proposition 65 in Plain Language" http://oehha.ca.gov/prop65/background/p65plain.html I hope this information is helpful!

Wed, 04/03/2013 - 15:27

Thanks for the insight on the regulatory agencies and testing standard. Very helpful. Can you or anyone else tell if the categories I listed sound correct for the type of sealant/adhesive described. Thanks.

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