The tape is also incredibly easy to use. Its peel-and-stick application eliminates the need for messy liquids or complicated tools Its peel-and-stick application eliminates the need for messy liquids or complicated tools Its peel-and-stick application eliminates the need for messy liquids or complicated tools Its peel-and-stick application eliminates the need for messy liquids or complicated toolsgray flex seal tape. Simply cut to size, remove the backing, and press firmly onto the surface. The tape adheres instantly, creating a strong bond that resists peeling, tearing, or cracking.