The present inventions relates to a composition for treating hair, especially human hair, the use of the composition, a process to treat human hair and a kit of parts comprising the composition. The inventors surprisingly found that a composition comprising a silicone vinyl dendrimer, a homopolymeric olefin, monomeric alkanes and/or cyclic silicones, and copolymers comprising olefinic and aromatic monomers mends hair split ends whose effect sustains several washes.