The COVID-19 pandemic has driven a shift in lifestyle toward non-face-to-face interactions, leading to a surge in paper waste. Recycling this waste is crucial for achieving a circular economy and carbon neutrality. Corrugated cardboard, commonly used as packaging material in logistic facilities, is primarily composed of paper and is highly inflammable. It can act as the initial ignition source and significantly contribute to fire expansion. The 2020 Icheon logistic warehouse fire highlights the imperative to enhance fire safety in logistic warehouses. Thus, investigating the fire performance of paper, commonly used in logistic warehouses, is paramount for mitigating fire damage in such facilities. This study aimed to analyze how varying amounts of Guar Gum and Expanded Vermiculite affected changes in the fire performance of recycled cardboard. We conducted the ISO 5660-1 test to assess changes in fire performance and the production of CO and CO2.