Rubber is a flexible, bendy material that is used for many different applications. It can be adhered to many different materials for various projects. If you are trying to adhere rubber to concrete on either the inside or outside of your house, there is an adhesive that will allow the two to bond together and form a strong connection that will be hard to break up.
Clean off the surface of the concrete. Verify there is no debris or other dust in the way. Brush off the concrete with a concrete brush, and wipe away all visible dirt and debris from the surface.
Wipe down the area with a clean, damp rag. Scrub out any grease or oil located on the concrete. Add dish soap to the rag, if necessary to remove all grime on the concrete. Wait for the area to dry, and ensure the surface is smooth so the rubber can adhere to it.
Slide a tube of rubber adhesive into a caulk gun, and press down firmly to secure it in place. Cut off the tip of the adhesive with a utility knife at a 45-degree angle. Lay the rubber down, and turn it over. Press the trigger on the caulk gun and run a thin bead across the entire back of the piece of rubber.
Add another bead of rubber adhesive, if the piece of rubber is wider than six inches. Turn the rubber back over and press it down firmly on the concrete surface. Run your hands over the top of the rubber so it can adhere in place to the concrete. Press down on the rubber and hold it in place for at least five minutes.
Remove your hands, and inspect the rubber. Verify it is secure in place and the ends are not coming up.
Repeat the process for any other pieces of rubber you need to adhere to concrete.