We provide mainly two types of defoamers, organic silicon defoamer like RQ-421 and RQ-422 and silicon-free defoamer like RQ-431, RQ-432, RQ-435 and RQ-4200. Kindly see the attached price and  technical sheet.Our surfactants can be formulated to produce Industrial Cleaner, Degreasers, Cleaning Chemicals, Degreasing Chemicals, Metal Cleaners, Rust Preventives, Ultrasonic Cleaning Chemicals, Ultrasonic Cleaners, Glass Cleaner and etc. With annual output of 5000 tons, 11 years of experience, a professional R&D team, ISO 9001 certification and one hour away from Shenzhen port, we offer superior quality surfactants and professional service to over 2000 customers.