Concrete is a durable and easily formed material that lends itself to a variety of home uses. Concrete is often a popular choice for a patio because it is relatively inexpensive and holds up to the elements well. After years of abuse, however, the surface may became heavily cracked and pitted. In this case, you do not need to completely break apart and re-lay concrete, but can instead easily apply a concrete resurfacer that will take care of cracking and pitting and renew the entire patio.
Insert the tube of concrete repair caulk into the caulking gun and slice the tip of the tube at a 45-degree angle.
Force the tip of the tube into cracks on the patio that are wider than 1/2 inch and apply a large bead of the caulk along the length of the crack.
Smooth over the caulk that spills out of the crack with a putty knife.
Mix together 2 1/2 quarts of tap water with a 2 pound bag of the concrete resurfacer in the large plastic bucket and thoroughly stir for 2 minutes using the drill motor and paddle.
Pour out the mix onto the concrete patio surface and spread to a thickness of 1/16 inch using the flat trowel. Work the trowel in wide sweeping motions across the surface to quickly spread the resurfacer. Avoid using the patio for 24-48 hours while the resurfacer fully cures.