Kérastase Specifique Bain Divalent 250ml Information Reviews Kérastase Bain Divalent Balancing Hair Bath for oily scalp and dry sensitised ends - Système Bi-Active. Your scalp is left fresh and re-oxygenated and your hair feels clean, nourished and beautiful. View Kérastase Specifique rangeNo reviews yet – you can leave a review and rate this product after purchase. £16.22 250ml Sorry, product is not in stock at the moment. Tweet