Foundation cracks can be unsightly. They also present a risk to your home by allowing water and cold air to infiltrate your space. It is not uncommon for new cracks to appear in the wake of foundation repairs as your foundation is restored to its proper settlement.
It is important to understand that foundation repairs should occur before cracks are repaired, as cracks are a symptom of the actual problem. Fixing cracks may only be a temporary measure, and the cracks are very likely to return in the event that an underlying problem exists. This video explains the materials you can use to fill in cracks completely.