Abstract: The present invention provides a composition having two separate, reactive components that when mixed together form a reactive mixture that undergoes curing or hardening, said two-component sealant and/or adhesive composition comprising: i) in a first component, at least one compound (VCC) having two or more exo-vinylene cyclic carbonate units, wherein said exo-vinylene cyclic carbonate units are bonded to one another by means of at least one organic, siloxane-free linking group, wherein said linking group is not directly bonded to the exo-vinylene double bonds and linking groups formed by polymerization of (meth)acrylic monomers are excluded; and, ii) in a second component, at least one multifunctional hardener that has at least two functional groups (F) selected from the group consisting of primary amino groups, secondary amino groups, hydroxy groups, phosphine groups, phosphonate groups, and mercaptan groups, wherein the compound (VCC) of said first component is characterized in that it has at least on