There are several options for repair of a leaky foundation crack.
Using a product such as Xypex or carbon armor or Flexispan will fill cracks. But, you need to ensure that the crack is not due to too much hydrostatic pressure. If you fill the crack the water and pressure will migrate to a new location. A free inspection to go over the various options you have for your basement or crawlspace is always in your best interest even if you decide to fix the issue yourself.