Measure the length and width of the damaged area and add 2 inches to both measurements. Transfer this to a vinyl pool patch to create a square or rectangle.
Cut the square or rectangle out of the pool patch with a scissors. Round off the corners so they do not become snagged on something and tear the patch off.
Wipe the liner around the damaged area with a clean cloth to remove all the dirt and algae. Apply an even layer of the supplied patching glue to the back of the patch and on the pool liner, around the damage.
Wait three to five minutes for the glue on the patch to become tacky. Press the patch firmly over the damaged area. Use your fingers to smooth the patch, removing all the wrinkles and air bubbles.
Lay your hand over the patch and apply a gentle pressure. Leave your hand there for two to three minutes -- if the depth of the leak allows, of course -- to allow the glue to set.