The DEFOAMER products can be applied in the fluid concentrate or as tank-side additive to diluted systems. The DEFOAMER products are free from silicone oils and do not cause problems in subsequent surface finishing such as painting. The products exhibit excellent long-term defoaming properties, they are much easier to incorporate into fluid concentrates than silicone oil emulsions, and the tendency to separation during storage is equally much lower than for the silicone oil emulsions.