Developed for professional plumbing contractors, Clean-Fit Products’ Blue Monster compression seal tape can be used without turning off the water source. Contractors can seal leaks up to 150 psi on almost any material from galvanized and cast iron to copper and all types of plastics and rubber. The tape features self-fusing layers that form a waterproof seal by compression without the use of any adhesive. Pulling and wrapping the tape tightly around problem leaks creates a chemical reaction that fuses the layers of tape into a mass of silicone.