Having a garden pond can create a relaxed and tranquil space in an otherwise hectic world. Watching fish swim lazily between plants can help one shed the stresses and strains of everyday life. The only problem is, the liners of a backyard pond can sometimes leak and will need repairs. Depending on the type of liner you have, the repair job can be fairly simple--or it can be a major undertaking. In this article we are assuming that you have used a flexible pond liner such as EPDM rubber.
Drain the pond so the area with the leak is exposed to the air and can dry out. Repairs should not be made during severely cold weather when the liner could be rigid with the cold.
Locate the area where the leak is and scrub the liner with a kitchen scouring pad in order to thoroughly clean the liner and to slightly roughen the surface of the liner around the leak.
Wipe the scrubbed area with a damp paper towel to clean it thoroughly. Wipe it with a dry paper towel to dry the area completely.
Cut a piece of 6-inch-wide pond liner sealing tape (available at most home-improvement centers or online) so it is approximately 6 inches longer than the cut or tear you are patching.
Pull the paper backing off the sticky side of the tape and carefully place the tape over the tear making certain that the tape extends approximately 3 inches past the edges of the tear on all sides of the tear. Use your fingers to press out any air bubbles as you lay the tape, starting at one end of the tear and slowly pressing the tape firmly down until you reach the other end of the tear. Pay special attention to the edges of the tape, pressing them firmly onto the liner.
Apply nontoxic 100-percent silicon sealant around the edges of your tape for added security. Allow the sealant to dry completely, following the manufacturer's instructions. Once the sealant is dry, add water to your pond.