PPG 3500 MW for flexible foam polyol 1. Used in flexible ... 2. Seats,package materials. 3. Fit in with ult PPG 3500 MW for flexible foam polyol 1. Used in flexible stabstock ... 5-7Viscosity 550-750Colority APHA ≤50unsaturated value ≤0.05Molecular weight 3500 Functionality 3 3.Packing: 200kg / bucket , blue paint bucket4. ... dry,dark,no heating and no broken barrel . PPG 3500 MW for flexible foam polyol