Granite slabs are often joined together with epoxy, a type of glue, to create countertops or other surfaces. This epoxy can chip or wear away over time, creating uneven seams in the granite piece. You can often fix uneven seams in granite on your own with the help of a granite repair kit.
Use a new utility knife, or attach a fresh blade to a used utility knife to ensure the sharpness of the blade. Position the blade at the back of the granite countertop, as close to the wall as possible.
Push the utility knife's blade into the seam. Move the knife toward you, while still inserted into the seam, in short movements. Once the utility knife fails to cut quickly through the epoxy, remove the used blade and attach a new blade to the knife.
Prepare the repair epoxy according to the granite repair kit manufacturer's instructions. Apply strips of masking tape to the edges of the granite countertop on both sides of the seam.
Scoop up the new epoxy with the applicator included in the repair kit. Starting at the back of the counter, drag the applicator slowly across the seam to apply the epoxy until the seam is filled. Smooth the applied epoxy as much as possible by running the applicator over the seam.
Remove the masking tape from the edges of the granite counter. Let the epoxy set for 10 minutes. Cut away any excess epoxy from the seam, using a razor blade. Allow the epoxy seam to fully dry overnight.