Isolaureth-10 is a cleaning agent, or "surfactant," that can be found in various household cleaners and detergents. It's also used, in very small quantities, as an emulsifier. As an emulsifier, it helps bind ingredients together and keep a formula from separating. Over time, it is possible for formulas in a product to separate. We add emulsifiers to our products where needed to ensure that our products provide the same performance use after use.