Used primarily as a silicone surfactant in polyurethane foam production, this terpolymer stabilizes the cell structure during foam rise and curing. It is especially effective in flexible slabstock foams, where it helps control cell opening, improve foam uniformity, and reduce shrinkage. The balanced hydrophilic-lipophilic character allows for optimal compatibility with polyol systems and efficient air dispersion. It also enhances foam softness and supports consistent density distribution. Commonly used in comfort foams for mattresses, furniture, and automotive seating.