industrial liquid concrete defoamer Chemical Composition Polyether modified organosiloxanesã?? Polyether polyolsã?? Dispersant silica E445 is used for defoaming and foam controlling in concrete and many kinds if powder construction materials, to enhances the strength of the materials, avoids the defect caused by pumping and blading, for instance, shrinkage and cavity, providing fast defoaming performance, good lasting suppressing ability, and stability.