Cocochoco free sulphate shampoos and conditioners are specifically designed and dedicated for Cocochoco Keratin and Hair Rejuvenating Treatment. Therefore, they are the only recommended products. Other sulphate free shampoos are not tested against the Cocochoco Keratin Hair Treatment, so we can’t say if they are suitable or not (some will work some won’t). Many shampoos that are sulphate free will contain other ingredients that are not appropriate as aftercare and can wash away Cocochoco Keratin Treatment very quickly. It maybe last two to three weeks and hair will come back to frizz and curls.