Schwarzkopf OSiS+ Rock Hard Ultra Strong Glue Ultra is a styling glue that grants strong hold and control of your hairstyle, ideal for a polished result. The texture is easy to work with and allows long-lasting radical hairstyles and shapes. Without gravity interfering with the final result, express your creativity through your hairstyle without any limits. Equally important, the product is as easy to apply as it is to wash off.