The best product for sealing and repairing cracks is a flexible putty-based product such as Quikrete Concrete Repair. This acrylic based putty is matte gray in color and has a texture that mixes with the surrounding concrete. All that is needed to apply this product is a caulking gun and a utility knife to cut the tip. Level your concrete patio with jack or polymer slab lifting techniques.
Once everything is level, you can coat or coat the concrete to cover the remaining cracks. In general, fixing cracked and uneven concrete is quite simple and does not require replacing the entire patio. If the crack is relatively insignificant and does not extend completely through the concrete slab, you can probably use some type of patch material to repair the cracks. The concrete will cure well once the mix ages and will not be affected by extreme pressure or temperature.
Most homeowners are used to sealing their wooden decks, but very few think about sealing their concrete patio, which is just as important. However, the lifting of polymer slabs cannot be used for concrete patios made of smaller stones or various pavers. The benefit of using it this way is that it will also fill in the gaps under the concrete slab where it hasn't sunk. This option is the most expensive DIY option, as it not only fills the entire depth of the break, but also forms a permanent chemical bond with the concrete slab, gluing the slabs together to seal them from any structural moisture.
Polymer Resin's main advantage is its incredible compressive strength, which at 12,000 psi or more exceeds that of most concretes. This is an excellent approach to rebuilding your concrete patio, as deck floors can instantly heat up any outdoor space. One solution to the problem of covering a cracked and uneven concrete patio is to repave the top of your concrete patio. Unfortunately, over time, many patios, terraces, or other paved concrete areas begin to develop cracks, and very quickly the paved area will not be an area where you want to spend a lot of time or especially where you want to enjoy with visitors or friends.
Despite the fact that concrete has a very strong building and construction material, it has limits. However, regardless of the approach you choose to fix a cracked and uneven concrete patio, you need to fix the problem immediately to avoid costly replacements and repairs in the future. The narrow cracks in concrete can be filled with an elastomeric filler that can be applied with a caulking gun, but many caulking and sealant products come in bottles with a special applicator tip.