ER-921 is a surface-active agent used to reduce the water evaporation rate from the surface of newly laid concrete. It is designed to form a thin film to reduce rapid moisture loss from the concrete surface. ER-921 is spray applied in diluted form to fresh concrete flatwork to reduce the tendency for surface plastic cracking to occur. ER-921 aids and improves the workability and finishing characteristics of the concrete surface. ER-921 also helps extend the surface workability time for a given set of weather conditions.

USES

• Use ER-921 as an evaporation retarder for concrete flatwork surfaces when the evaporation rate exceeds the bleeding rate. Recommended for use on all concrete surfaces except dry shake hardeners and toppings.

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