According to the classical norms for preparing polyurethane soles for gluing, the adhesive surface of the material must be ruffled. Dust and loose material residues are blown out. The adhesive surface of the soles is washed with specialized cleaners or solvents. After 15 minutes of exposure, polyurethane adhesive is applied. To improve the quality of adhesion, it is possible to apply glue in 2 layers (it is recommended to use polyurethane glue of 12-14% concentration as a primer layer).
