Set retarding admixture

CHRYSO®Tard 50S slows down the hydration of cement by momentarily blocking the surface of the cement particles. At the end of setting, the concrete hardens rapidly and higher compressive strength is obtained after 28 days.

CHRYSO®Tard 50S has no surface tension effects. Its use in concrete modifies in no way the consistency of concrete.

CHRYSO®Tard 50S can be used simultaneously with high range water reducing superplasticizers.

Application domain

  • All cement types
  • Concrete with workability retention
  • Precast elements
  • Workability retention
  • Ready-mix concrete
  • Piles
  • Prestressed concrete


  • CHRYSO®Tard 50S is used to adjust the workability retention and initial workability being fine-tuned thanks to the ultra / high range water reducing admixture.
  • CHRYSO®Tard 50S can therefore be used for a wide range of concretes.
  • CHRYSO®Tard 50S is the perfect solution in case of remote jobsite or heavy traffic, as well as temperature changes.
  • CHRYSO®Tard 50S makes it possible to avoid re-tempering at the delivery point.
  • CHRYSO®Tard 50S is particularly suited for cements for which workability retention is difficult to get and/or at high temperature.


  • 20 L bucket
  • 215 L drum
  • 1000 L IBC

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