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Concrete retarders are a chemical solution designed to slow down curing process in the cement. Concrete Retarders are typically used to prevent the chemical hardening of the surfacing of the concrete, allowing the cement to be washed off the following day to expose the aggregate.
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What is Sika Rugasol 90?
Rugasol 90 is a specially formulated liquid surface retarder for summer conditions. Rugasol 90 will cause retardation to the surface of the freshly laid concrete, and will result in an exposed aggregate type finish.