Tego® Antifoam 691 is a 100% active defoamer compound based on an organomodified siloxane. It is particularly suitable as a pre-defoamer for a wide range of emulsifiable metalworking fluids (MWF). Tego® Antifoam 691 can be applied to soluble oils and semi-synthetic fluids based on mineral oils or ester oils as well as for MWF that are based on blends of these. It may also improve the foaming behavior of water-soluble MWF. Tego Anifoam 691:

• Provides excellent foam knock down and hold down properties
• Shows an outstanding long-lasting defoaming persistence
• Provides excellent filterability properties, which minimizes the amount of additional tank side defoamer
• Allows the formulation of stable MWF concentrates
• Is free of silicone oils