3M™ Firestop Identification Labels are bright red labels that stick quickly and reliably to joint and penetration firestop systems in order to provide highly visible information regarding firestop maintenance, repair and inspection.The 3M Firestop Identification Labels can be applied quickly and reliably to clean, dry, frost-free surfaces in order to provide the required information regarding firestop maintenance, repair and inspection. These identification labels are bright red with a bright white backing for maximum visibility.