Prolong your favourite hairstyle with the schwarzkopf professional osis undercoat primer foundation formulated to provide your hair with the perfect base for any style this innovative resurfacing solution transforms the texture of your hair to reveal a soft surface thats pliable to any style perfect for those with a porous hair type its anti frizz effect smoothes and nourishes unruly locks for an instant sleek finish with high shine results apply to the midlengths to the ends of damp h