Prepolymer mixture containing silyl groups and use thereof

Monocomponent water-hardening adhesive/sealant compositions comprising mixtures of at least one silane-functional polyoxyalkylene prepolymer and at least one silane-functional polyolefin are described. These compositions may optionally comprise other nonpolar plasticizers, as well as catalysts, fillers, and adhesives. Such adhesive/sealant compositions exhibit outstanding adhesion to plastic substrates and to painted surfaces, whereby the adhesion is maintained even after storage in wet conditions.