The basics Tame unruly curls with American Crew Curl Control. The benefits Conditions and adds sheen to hair, adds volume to hair while acting as a conditioning agent, a natural lubricant used to provide body and shine. The uses This light, versatile product calms the surface of curly, thick or rough hair while increasing curl definition, structure, and texture. The bottom line Curl Control tames unruly curls and enhances definition.