ABIL® UV Quat 50 is a conditioning agent for hair fiber protection in rinse-off and leave-in applications, such as hair conditioning shampoos, rinses and balms and leave-in treatments to provide efficient protection of the hair fiber against UV-damage, and color fading in sun light. As the product is cationic, it is substantive to the hair keratin, forming a thin protective layer which absorbs damaging UV irradiation. The protective effect of ABIL® UV Quat 50 is proven for both, the integrity of the fiber structure itself and the color of the hair. While fiber protection is a key claim for conditioning formulations, the color protection efficiency is most attractive as it is a consumer perceivable property. ABIL® UV Quat 50 is compatible with anionic surfactants.