When it comes to sticking concrete together, there are a few different methods you can use. For smaller projects around the house, Loctite Extreme Glue Gel is a great choice. This highly versatile formula contains Flextec technology that adheres quickly and allows flexibility. It is suitable for indoor and outdoor use, but keep in mind that permanent exposure to water may decrease adhesion.
If you don't want the concrete to stick to the wood, you'll need to use a mold release agent to make removal easier. Sawmills often pre-treat wood with oil-based mixtures to make it resistant to sticking. If your wood has not yet been treated, you may need to purchase a commercial agent and apply it yourself. For smaller repairs or quantities of glue, the caulking technique is a great option.
All you have to do is prepare the space, add the cartridge to the caulking gun, and place the applicator around the perimeter of an object. Press the parts together and follow the instructions for how long you will need to cure the concrete glue. When it comes to larger projects, such as bonding concrete with wood, drywall, plaster, brick, foam board, cork and other materials, an adhesive mixture for concrete is best. To promote adhesion, you'll need to add a bonding agent (bonding adhesive) first and paint it over the existing concrete.
Surface preparation is absolutely vital to ensure that the bonding agent is applied properly. If an existing concrete surface has grout (a dusty layer of cement and fine aggregates) or has been contaminated with spills such as oil or grease, the bonding agent will not work well. Start by carefully sweeping away all loose stones and dirt and rinsing the concrete to prepare the surface. If you are repairing existing concrete, you will need to make sure that the concrete sticks properly to these materials in order for the repair to last as long as possible.
To do this, apply a thin layer of cement paint, pour a well-mixed concrete patch into the holes and clean the surface with a wooden float. Whether laying carpets, bonding metal to concrete, or repairing roads, Loctite has the right concrete adhesive for the job. Apply the adhesive in a zigzag pattern and repeat these actions until your wall has been built up to your desired height.