The invention relates to a one-component structural adhesive having a flow limit of at least 1500 Pa and an initial adhesion of more than 30 g/cm.sup.2, which contains at least one thickening agent and/or at least one filler. The invention further relates to the manufacture of such one-component structural adhesives and to the use of one or more thickening agents and/or one or more fillers for the manufacture of solid to kneadable one-component structural adhesive compounds having high initial adhesion.