Gutters prevent rainwater from pouring off of your roof in sheets. Since gutters sometimes handle heavy loads of water, they may rust or crack. To repair your broken gutter, use caulking to seal the cracks. The process is a lot cheaper than hiring someone to repair it for you, or completely replacing the broken gutter with a new one. You only need a few household tools to start fixing your broken gutter.
Locate the exact spot where the gutter has been broken. Trace the leaks to determine where the water is pouring or dripping from. These are normally tiny holes or cracks on the gutter. Climb up to the roof, using a ladder if necessary, to get a better view of the broken gutter.
Apply silicone caulking compound to the remaining cracks as well as to the joints of the gutter to prevent further leaks or damage. Use a caulking tool to caulk the outside and inside of the gutter to provide a stronger seal.