...... J-B Weld FiberWeld 2 Pipe Repair Cast: A high-strength one-time use fiberglass wrap, impregnated with a specially formulated anti-corrosive resin providing a permanent protective adhesion to a wide variety of pipes. When activated by water, the product forms a strong, permanent bond that hardens like steel in 15 minutes. All you have to do is wet, apply and let it dry and in 15 minutes it hardens like steel!