we've known for years about the change in VOC classification from having a dedicated category of Intumescent Coatings to considering them as an Anti-Corrosive coating. A current LEED-HC project has RectorSeal's "Biostop Putty" and "BioStop Wrap Strip". Common sense tells me that the Biostop Putty (which seals holes in fire-rated walls) is a Sealant; while the Wrap Strip (a tape that wraps around a pipe) is a coating, but I've learned to not simply trust common sense. Any enlightened input is greatly appreciated. Thank you, Andrew
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Jon Clifford
LEED-AP BD+CGREENSQUARE
LEEDuser Expert
323 thumbs up
September 3, 2014 - 1:30 pm
Your common sense is mostly right. Both the putty and strip products that you mention appear to be intumescent firestop sealants. These fall under SCAQMD 1168 as “Architectural Sealants.”
Susan Walter
HDRLEEDuser Expert
1299 thumbs up
September 3, 2014 - 2:49 pm
I would agree with your classification. What I did notice was the MSDS on the biostop putty. They aren't listing any Cali Prop 65 compounds but they are listing TSCA compounds. I'd recommend you double check for Group 1.
Andrew Gil
Architect, Associate, LEED AP BD+C. USGBC NY Upstate Board of DirectorsHOLT Architects. P.C.
63 thumbs up
September 9, 2014 - 1:18 pm
Thanks Jon, Thanks Susan;much appreciated.
Susan - I'm assuming that you agree with Jon's more informed classification than mine. And thanks for catching the TSCA compounds! Best, Andrew
Susan Walter
HDRLEEDuser Expert
1299 thumbs up
September 10, 2014 - 10:23 am
I would count both products as Jon suggested but I always pause when we have taped conditions. It is a gray area to me since tapes aren't listed in the standards. Since the intumescent is there in addition to the tape, I would count it.
Jon Clifford
LEED-AP BD+CGREENSQUARE
LEEDuser Expert
323 thumbs up
September 10, 2014 - 12:07 pm
Susan is correct that SCAQMD 1168 does not address adhesive tape and that tape-like products can be misleading.
The “Wrap Strip” product resembles tape, but in form only. The product is designed to wrap around pipe or conduit a number of times at wall penetrations to form a seal of the required thickness. It is not an adhesive tape. It functions as a sealant.
Both of the firestopping products listed above meet the SCAQMD 1168 definition of “Sealant” because they are “formulated primarily to fill, seal, or waterproof gaps or joints between two surfaces.”