Adhesive material is a process that is used for bonding. According to DIN EN 923 is an adhesive as a non-metallic materials, the parts to be joined by surface adhesion (see adhesion) and inner strength (see cohesion can join). Although there are adhesives based on inorganic compounds such as water glass (sodium or potassium silicate), or the products based on cement, the vast majority of today's adhesives used to assign the organic compounds.