Based on Sections 2-3.3.1 and 2-3.3.2 Nomaco Insulation Elastomeric Insulation Products* meet the
requirements of NFPA 90A at 1-1/2” thickness and below. Polyolefin insulation products meet this
requirement at 1” thickness and below. The reference to ASTM C411 states that the material “shall not flame,
glow, smolder, or smoke” during a 250°F test. Note: Materials based on polyolefin resins would collapse and
melt, but would not flame, glow, smolder or smoke. NFPA reviews materials from a fire hazard standpoint,
thus the reason for these specific requirements.