A method for shaping keratin fibres, wherein the method comprises: applying a reducing composition to keratin fibres rinsing the keratin fibres applying a fixing composition to keratin fibres, wherein the fixing composition comprises a crosslinking agent, wherein the crosslinking agent has at least two functional groups selected from the group consisting of: &mdashNH2, &mdashNH&mdash, &mdashSH, &mdashOH, &mdashC(&boxHO)H, &mdashC&boxHO, and &mdashCOOH, and wherein the crosslinking agent has a molecular weight of 500 g/mol or less drying the keratin fibres treating the keratin fibres with a shaping appliance optionally rinsing the keratin fibres. Also a related use and kit.
