• Professional butyl tape made with high-quality aluminum foil and butyl rubber, resistant to heat, ultraviolet light, aging, and corrosion. • Super strong adhesion that provides a waterproof seal, ideal for preventing leaks in the home and in industrial applications. • Wide application: suitable for roof leaks, window sealing, deck repairs, RVs, gutters, PVC pipes, and more. • Easy to install on uneven surfaces; simply measure, cut, remove the sealing film, and press firmly. • Product specifications: 150mm wide x 4.9m long, with a strong and durable rectangular structure.