Sika® ViscoFlow® -25 ZA works based on a combination of electrostatic adsorption and steric repulsion effects. Thus, solid particles can be effectively dispersed and a high level of fluidity can be reached with less water. As a result, Sika® ViscoFlow® -25 ZA can provide higher workability time and stability than conventional dispersants.

• Compatibility with other additives
• Keeps workability for extended time
• Slump retention without additional retardation and subsequent fast strength development

Sika® ViscoFlow® -25 ZA does not contain chlorides or any other ingredients which promote the corrosion of steel. It is therefore suitable for use in reinforced and prestressed concrete structures.