Understanding ISO 5657: Reaction to Fire Tests - Spread of FlameFire safety is a critical consideration in various industries, including construction, transportation, and manufacturing. To assess the fire performance of materials and products, international standards have been established. ISO 5657, specifically the "Reaction to Fire Tests - Spread of Flame" standard, sets the benchmark for evaluating the propensity of materials to support flame spread. In this article, we will explore the signi