FiberWeld 2″ Pipe Repair Cast is a high-strength fiberglass wrap, impregnated with a specially-formulated resin to repair pipes up to 1″ in diameter. When activated by water, the product forms a strong, waterproof bond that hardens like steel in 15 minutes. The kit includes an epoxy putty stuck for additional sealing strength.GREAT FOR Professional Plumbing Repairs DIY Plumbing Repairs USE ON Copper Cast Iron PVS ABS Galvanized Steel Rubber and more! 2″x60″ cast.