This link should help, Donna:
check this pin https://www.pinterest.com/pin/826762444064770398/?nic=1
Depending on the size of your crack, wide cracks in concrete are best patched and sealed with a concrete patching compound. Smaller cracks, less than 1/4 inch wide, can be repaired with a concrete caulk or liquid filler. Patching compounds typically are mixed with water and applied with a trowel.