What is the maximum allowed relative humidity for SFRM samples?

The maximum allowed relative humidity for Spray-Applied Fireproofing Material (SFRM) samples is set at 60%. This standard is in place because high humidity levels can negatively impact the performance and curing of the fireproofing material. Maintaining a relative humidity of 60% or lower ensures that the material can properly adhere to surfaces and cure without issues that can arise from moisture in the environment. When humidity levels exceed this threshold, it can lead to problems such as improper curing, inconsistent application, or diminished fire-resistance performance, all of which are critical factors in ensuring safety and compliance with fire code regulations. Understanding this limit is essential for professionals working with SFRM to ensure effective and reliable fireproofing applications.