Schwarzkopf OSiS+ Undercoat Primer Foundation 2.5 oz is a primer foundation that provides the perfect base for any hairstyle. This Undercoat ensures hair has a flawless surface and evens out porosity for improved hair feel. It gives hair a silky shine with anti–frizz effect. To use, just distribute a very small amount between your palms and apply to mid–length and ends of damp hair. Continue with other OSiS+ styling products or use on its own to enhance the hair’s natural beauty.