ALTIC water-based fire retardant paints are designed to be effective on a wide range of surfaces, including gypsum board, metal, and cement walls, primarily due to their intumescent properties and adaptable application process. Here are the key factors that contribute to their effectiveness across different surfaces: Intumescent Action Expansion During Fire: When exposed to heat or flame, ALTIC water-based fire retardant paint swells and forms a thick, insulating carbon foam. This foam can expand to many times its original thickness, creating a physical barrier that insulates the underlying material from heat and flames. Heat and Flame Barrier: The expanded foam layer slows down heat transfer and blocks direct contact between the flame and the substrate, significantly delaying or even preventing ignition and structural damage.