WU-50 is concentrated material of TPU which can increase haze of membrane. It's specially designed for blowing process. You can observe the significant effect by adding small amount of WU-50 to your process (10% to 15%). The unique formula of WU-50 will change the physical properties of membrane during production process of membrane. WU-50 is fully compatible with both type of polyester and polyether TPU. The final appearance of membrane is low gaze with white surface .