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Prevent Exposed Aggregate Problems


Problems associated with exposed aggregate are generally caused by uncontrolled concrete setting times, which can lead to poorly exposed aggregate, insecure exposed aggregate and inconsistency of texture. 


These issues can be prevented through the use of a water-based chemical retarder such as MasterFinish® 380. Specifically developed to overcome the issues that can be associated with uncontrolled concrete setting times, MasterFinish® 380 delays the setting of the mortar paste on the surface to a controlled depth, without adversely affecting the setting of the main concrete. The chemically retarded mortar paste may be removed by washing or brushing within a 24 hour period after the set of the concrete to expose the aggregate.