Laneth-20 is a surfactant. It helps to reduce surface tension of substances to be mixed or emulsified. In cosmetics it helps water to be mixed with oil, sebum and dirt so that they can be easily rinsed away. Moreover Laneth-20 helps to reduce brittleness and cracking in finished products. When used in the formulation of gels, the Laneth ingredients alter the thickness of the liquid portion of the product.