PPG-6-DECETH-4 is an emulsifier which can also be found in paints and coatings for the automotive industry. We add emulsifiers to our products where needed to ensure that our products provide the same performance use after use. Over time, it is possible for formulas in a product to separate. An emulsifier helps oil mix into water. In our shoe care products, it also penetrates leather it is applied to helping soften the material.