Kérastase hair styling products. RESISTANCE Volumifique Soin Spray Expanseur. Volumizing treatment for weakened hair. Its formula contains Vita Ciment that strengthens the hair fiber from deep within, Texturizing Polymers that give thickness to hair and Texture Stylight that gives volume and lightness at the same time. The result is a hair with a natural-looking volume, silkiness and shine. Doesn't need to rinse.