When your project demands more than just ordinary tape, the Polyken 337 steps in with unmatched strength and reliability. Designed to bond and seal like a pro, this multipurpose foil tape is your go-to solution for insulation, HVAC work, and general repairs—indoors or out. Crafted with a durable aluminum backing and pressure-sensitive adhesive, the Polyken 337 sticks securely to metal, plastic, and a variety of surfaces—even in extreme temperatures. Its reflective finish adds a touch of sleek protection while resisting moisture, UV rays, and weathering. Whether you're sealing ductwork, wrapping insulation, or tackling a tough repair, the Polyken 337 delivers professional-grade performance with every pull. And at nearly 3 inches wide with 50 yards of length, it’s built to go the distance.