Kerastase Specifique Dermo-Calm Serum Sensidote (50ml) This Specifique Dermo-Calm Serum Sensidote from Kerastase is designed to soothe the scalp & give your hair an unbeatablely soft texture that lasts. Perfect for sensitive scalps & suitable for all hair types this serum is an effective treatment that really works. Helping to relax the scalp & give you some much needed TLC pecifique Dermo-Calm Serum Sensidote is a luxurious leave in serum that will leave you feeling both refreshed & rejuvenated.