Silicone based defoamers are used for problems of foam formation in aqueous systems. Effective foam control agents in acidic or alkaline media, dispersible by dilution in cold or hot water with gentle agitation. They are insoluble in foam formation and have active surface properties. They have low viscosity and spread rapidly on foamy surfaces. They have affinity to air-liquid surface, destabilizing foam, which causes the rupture of the air bubbles and the disappearance of the foam.
Silicone based defoamers are polymers with silicon, water or oil based emulsions, they consist of a hydrophobic silica dispersed in a silicone oil. They are high resistance antifoams that, while destroying the foam, release air that is trapped in the medium where they are applied.