I actually called home depot. They told me it was under warranty and gave me the installers number. I talked to them, they said it was under warranty for 10 years, then after I scheduled the appointment they showed up and said it would be 100 dollars to fix. I told them I would pay it, but they would fix it. I was told by 2 different people is was covered. Anyway, they did. I'm not sure what they used. It's a filler of some sort. You can see it a bit, but blends in fairly well. He used a razor blade on it and said it should last for life. Good luck. Let me know if you figure out how to do it yourself, because I'm sure it's going to happen again.