* Film Former: Polyethylene creates a thin, flexible film on the lips. This film acts as a barrier, helping to protect the delicate skin from environmental factors like wind, cold, and sun. This barrier also helps to lock in moisture, preventing dehydration and chapping.
* Viscosity and Texture: Polyethylene can thicken the balm, giving it a smooth and spreadable texture. It helps to provide a good consistency, making the balm easy to apply and adhere to the lips. It also contributes to the balm's overall feel, often providing a slightly waxy or emollient sensation.
* Occlusive Properties: Polyethylene is occlusive, meaning it reduces water loss from the skin. This is crucial for lip balms, as the lips are prone to dryness and require ingredients that can help retain moisture.
* Emollient: It can act as an emollient to help soften and soothe the skin.