Aubin's green defoamer DF-4 is used to manage or prevent foaming in cement slurries. The cement mixing process can cause air entrainment in the slurry causing a deterioration of quality and change of density in the cement. Defoamer DF-4 controls the volume of air in the cement to keep the slurry consistent with its original design.

Excessive foam, froth or air entrainment in cement slurry can cause extreme difficulty in mixing and pumping the slurry, compromising mixing rate and overall job execution.