J-B Weld FiberWeld 1" Pipe Repair Cast. Water-Activated Fiberglass Wrap that is a High-Strength Adhesive and Fiberglass in One. Works on Pipes up to 1 Inch in Diameter. Easy to Use: Wet, Apply and Done! Hardens Like Steel in 15 Minutes. Holds Household Water Pressure. Built with FiberFix Technology. Great for Repairs on Copper, Cast Iron, PVC, ABS, Galvanized Steel, Rubber and More. Made in the USA.