Water coolers provide a great way to carry and conveniently dispense large amounts of fresh, purified water. Commonly found on sports fields and in office break rooms, water coolers are built to stand up to the wear and tear that comes with transport. However, after a hard fall onto the dugout cement or a tiled kitchen floor, the cooler may crack and begin to leak. Small cracks are easily fixed, and your water cooler will soon be as good as new.
Locate the leak in the water cooler. Most leaks result from internal cracks. In some cases the crack may penetrate through to the cooler's outer shell.
Sand the edges of the crack and the area surrounding it with 120-grit sandpaper. This will allow for better epoxy adhesion.
Apply a bead of plastic epoxy to the crack, packing it in with a small epoxy spreading tool. If the crack penetrates to the outside of the cooler, pack this crack with epoxy as well.
Spread excess epoxy over the area surrounding the crack so a patch is formed. This helps bond the edges and forms a sealing barrier.
Sand the epoxy smooth with 120-grit sandpaper after allowing the epoxy to cure overnight.
Wash the inside of the water cooler thoroughly with warm water, soap and a sponge before filling it with any drinking water.