Hunter Polyiso Blog

Does the use of seam tapes and adhesives impact the NFPA 285 test?

The short answer is "no".  Although NFPA 285 is an assembly test, ancillary prodcuts that are used for panel joint treatment or to tack insulation boards in place would not typically impact the performance of the assembly because the relative volume is so small.  This would include products such as caulks, sealants, seam tapes (typically 4" or less in width), and dabs of adhesive.

To learn more about the NFPA 285 testing, here are some links and blog posts that provide helpful information

  • Hunter Panels has a page devoted to NFPA 285 on their website: Click here
  • National Fire Protection Association Website, Code page Click here
  • PIMA BLog post on Understanding NFPA 285: Harmonizing Fire Performance and Energy Efficiency in Exterior Wall Assemblies Click Here
For more information, please reach out to a member of our technical team at This email address is being protected from spambots. You need JavaScript enabled to view it.

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