WHAT IT IS OSiS Rough Rubber is a rugged texturizer with a subtle matte finish. WHAT IT DOES Schwarzkopf Professional OSiS Rough Rubber separates defines and shapes as you wish. Formulated with a rubbery consistency it s perfect for creating rough rugged styles. Rough Rubber leaves hair with a subtle matte finish and gives thicker hair strong control but does not overburdening finer hair.