How to Repair Cracks in a Concrete Wall - The Spruce
Cracks in concrete walls can be repaired with a liquid or paste elastomeric compound. The compound is squirted into the crack with a bottle or forced into the crack with a putty knife. Cracks up to 1/2-inch wide and 1/4-inch deep, either interior or exterior, can be repaired this way. This compound can usually be painted over with latex-based ...