Product description: SITREN AirVoid® 651 is a powdered amphoteric surfactant for the generation of air voids in construction applications. Applications: SITREN AirVoid® 651 is used as an air-entrainer for various cement, lime and gypsumbased systems such as concrete, mortars, tile adhesives, EIFS and stucco/renders/plasters. Information provided by Evonik |