Designed to seal, fill, bond and stop air infiltration. More effective than traditional fireblock materials at blocking the passage of flame and smoke in concealed penetrations from room to room and floor to floor in Type V residential construction. HandiFoam Fireblock has a recognizable orange color allowing inspectors to easily identify the use of an approved fireblock product for Type V residential construction. Due to its expansion characteristics, HandiFoam Fireblock is more effective than many traditional fireblocking materials for the blocking of flames and smoke in concealed penetrations, preventing flame spread from room to room and floor to floor.