Can hairline cracks in granite be repaired?

Hairline cracks in granite can be repaired with a restorer-grade granite repair kit. The repair kit includes pulverized stone, a liquid binder and a catalyst that are mixed together and then used to fill the crack. Buffing the surface with fine-grit sandpaper finishes the repair.

Repair kits include stone in a variety of shades to mix and match with the original granite. Because every piece of natural granite is different, it is difficult to get a perfect match. After the patch material dries, a razor blade is used to scrape off any excess filler material. Those who want to have a near perfect match hire professional granite repairers with experience instead of doing the repair themselves.