SikaTard® R ZA is a liquid admixture developed for the control of cement hydration. SikaTard® R ZA retards/stabilises sand/cement masonry mortars and concrete mixes.
SikaTard® R ZA retards/stabilises the hydration of the cement.
Strong retardation/stabilising to enable brick/block laying to continue over long periods of time.
Delays the set of the mortar, however the retarding/stabilising effect declines once in place as the moisture evaporates and migrates due to the sunction of the brick/block enabling setting and curing to occur as normal.