The present invention relates to a composition with enhanced speed of set,especially to a method of making rubber~-like elastomers with improvedhardening characteristics. In this respect the present invention provides acomposition comprising with respect to the cured composition a ethylene iminegroup containing component A, a SO2-NH group containing component B and aninitiator C. Optionally additives like modifiers, fillers, dyes, pigments,thixotropic agents, flow improvers, polymeric thickeners, surfactants, odoroussubstances, diluters and flavourings can be added.