<p>As a result of elevated inherent flammability of polyethylene (PE) matrices during fire condition and their increasing applications in heat and fire prone sectors, it has become imperative to alleviate and mitigate their inherently high flammability in order to enlarge their scope of applications. Herein, the cone calorimetric parameters of PE including rapid time to ignition (Tign), elevated smoke production rate (SPR), high peak heat release rate (PHRR), high total heat release rate (THR), low limiting oxygen index (LOI), rapid heat release rate (HRR), high carbon dioxide (CO₂) and carbon monoxide (CO) release rates, high fire growth index (FGI), and UL-94-V-0 status, and so on, are analyzed to ascertain the degree of flame retardancy achieved for expanded multifunctional applications due to the inclusion of nanoparticles (graphene and derivatives, carbon nanotubes and derivatives, nanoclay and derivatives, and so on) within the polymeric matrices. However, this work is limited to interpretation of cone calorimetric parameters relative to thermal and flame retardant properties. Therefore, this paper investigates the thermal and flame retardant (FR) calorimetric parameters of PE nanocomposites for multifunctional applications especially in segments where heat inhibition and flame retardancy are essential.</p> Graphical Abstract <p></p>