Fortunately, there is a way to permanently repair such cracks quickly and effectively. Concrete foundation cracks may be repaired by using pressure injection of an epoxy or polyurethane foam material. For the repair of concrete floor cracks, certain epoxies and polyurethane materials exists, suitable for such slab repairs.
High quality epoxy and polyurethane products, injected by a waterproofing contractor, is very effective in repairing cracks. Crack injection techniques are relatively simple, yet not recommended by an untrained person. Many foundations have been greatly damaged by untrained crack injection techniques.