To obtain a perfect adhesion of the substrates, surfaces must be clean and free of dust, grease, oils, water, pollution, rust and so on. At certain times, in addition to a mechanical treatment is also recommended a cleaning process with organic solvents (alcohol or MEK) until all the polluting agents have been completely eliminated. In some cases and with some materials a priming process is also required. Do not use soaps, detergents or water.
Place the nozzle on the cartridge and cut it according to the wished width joint. Press the sealant with the application gun to cover perfectly well all the joint and try to fill all the gaps in. Spread with a round spatula. Deep joints have to be filled with filling material to avoid the sealant to adhere to the bottom. Any change must be carried out before the end of the skin formation time.