Hydrocon R3
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Hydrocon R5


  • Reduces concrete waste in case of changing concrete casting schedule
  • Excellent retardation for a long time up to 3 days
  • Excellent slump retention for very long concrete deliveries
  • Saves transit mixer drums in case of accidents
  • Reduces the needed amount of water to clean the transit mixer
  • Chloride-free

Hydrocon ST is a liquid admixture formulated from selected polymers specially designed to retard the setting time by controlling the hydration process of Portland cement and other cementitious materials for a long time.

This effect can be used to keep concrete mixes workable for a long time starting from 3 hours till three days.


  • For wet type shotcrete
  • For long-distance concrete delivery
  • High-performance concrete
  • Concrete wash water stabilization
  • To avoid setting of concrete in transit mixers in case of an accident

Materials Supplied

Hydrocon ST is available in 5 gal (19 litre) containers as well as 275 gal (1,041 litre) and 330 gal (1,249 litre) IBC totes. Bulk supply in tanker trucks is also available upon request. 

Shelf Life

Hydrocon ST has a shelf life of 12 months from date of manufacture if stored properly in its original unopened packing at temperatures between 35°F and 122°F (2°C and 50°C).

Application Instructions

Hydrocon ST should be added to the concrete with the mixing water to achieve optimum performance. Also it can be added directly to the drum of concrete mixers when unplanned changes in concrete casting schedule.


The recommended dosage of Hydrocon ST is between 0.75 to 38 fl oz/100 lb (50 to 2,470 ml/100 kg) of cementitious materials in the mix, including GGBFS, PFA or microsilica.

Actual dosage depends on the desired retardation. Representative trials should first be conducted to determine the optimum dosage of Hydrocon ST to meet the performance requirements by using the materials and conditions in actual use.

For traditional compliance with ASTM C494, the recommended dosage is between 0.75 to 5 fl oz/100 lb (50 - 325 ml/ 100 kg of cementitious materials in the mix.


Overdosage of Hydrocon ST will cause the following:

  • - Significant increase in retardation.
  • - Increase in workability.

Hydrocon ST is an irritant fluid. Contact with skin and eyes must be avoided. Safety glasses and rubber gloves must be worn during handling. In case of contact with eyes or skin, immediately flush with plenty of water and seek medical attention.


This data sheet is for general guidance purposes only and may contain information that is inappropriate for certain conditions of use. Accordingly, all recommendations and suggestions are made without guarantee. Further information is available from our Technical Department.

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Don Construction Products Inc.

2826 Lineberger Industrial Dr.
Lancaster, SC 29720

Tel: +1 803 286 5430
Fax: +1 803 286 5432

E-mail: info.usa@dcp-int.com