Pluriol® P This product is polypropylene glycol. Act as a defoamer. It is a 100% active, nearly colorless, somewhat viscous liquid.Pluriol® P 4000 is 100% active polypropylene glycol based surfactant. This grade acts as a defoamer. Pluriol® P It is produced by reaction of dipropylene glycol and propylene oxide in controlled proportions. Pluriol® P 4000 is suitable for rubber processing, foam inhibition and brake fluid formulations.