If need to fix a leak quickly in a plumbing line, you can use epoxy putty. It is a handy way to repair pipes and fittings instead of cutting out the leaking pipe and soldering in a new fitting. It is simple to use and virtually anyone with even limited do it yourself experience will be able to use epoxy putty to stop a leak. Follow these steps if you want to fix a leak with epoxy putty.
Find the exact spot that is leaking. If is a slow water leak then dry the area and place a piece of paper towel over the suspected area. Remove the paper towel and inspect it for a wet spot. Continue with this method until all leaks are found.
Turn off the water to the house. Turn on the faucets in the house. This will release the pressure from the plumbing lines.
Sand the plumbing pipes with 100 grit sand paper. The pipes must be clean, dry and free of all loose debris. Copper lines must be shiny.
Cut a section of epoxy putty from the tube with a utility knife. Kneed the putty with your fingers until it is completely mixed. You can tell when it ready to use by looking at the color. It will turn one solid color once it is mixed.
Press the epoxy putty onto the pipe. Wrap the tubing completely and overlap at least one inch on each side of the leak. If the leak is in a fitting then cover the entire fitting with epoxy putty.
Use the epoxy putty with in 3 minutes from the time you mix it. This is important. It starts to cure quickly. Only mix what you can use in 3 minutes at a time.
Turn the water on after one hour.The putty will be hard after 10 minutes but it takes an hour to completely cure. Check for leaks.