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Estop Admix AP

The Water Reducing Plasticiser and Set Accelerator

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Estop Admix AP is a liquid water reducing set accelerator for concrete and mortar, formulated from carefully selected active ingredient.

Estop Admix AP is a cement dispering agent which acts as a catalyst and produces high early strength concrete. It reduces the water cement ratio, accelerates the initial set, increases durability, reduces shrinkage and improves workability.


  • Allows the reduction of water cement ratio.
  • Improves the compressive strength, impermeability and durability of concrete.
  • Reduces the time required for the initial set.
  • Increases the early and ultimate compressive strength of concrete.
  • Reduces cracking by minimising plastic shrinkage.
  • Improves workability.
  • Permit early removal of formworks.
  • Reduces concreting costs.

Standard Compliance

  • ASTM C494 – 92 Type C & E
  • BS 5075 : Part 1 : 1982

Physical Properties

Appearance Greenish blue
Specific Gravity at 25°C 1.12
Viscosity (cP) at 25°C 1.39

Application Instructions

Estop Admix AP in required to be dispred in water prior to addition to the concrete and Portland cement mortar mixes.

If added to transit or ready-mix truck, minimun one minute mixing is required before discharging.

Dosage Rates

The effect of Estop Admix AP depend on variables such as cement composition, ambient temperature and mix design. It is recommended to carry out trials for determining the dosage required.

Under normal circumstances, the dosage shall be 0.6% to 1.2% of the total cement content.


Overdosing will generally produce considerable increase in workability and will accelerate the setting and hardening process. In no circumstances should the dosage rate exceed 2.5 litre per 50kg of cement.


Estop Admix AP is generally compatible with general air entraining agents, retarders and fly ash. Other admixtures may be used with Estop Admix AP subject to prior consultation our technical department.

Test Result

The following data are compiled from our investigations and laboratory testing. It is to illustrate the effects of Estop Admix AP on concrete mixes and use as guides for your own trial mixes.

The effect of Estop Admix AP on setting time

Dosage Rate / 50 kg OPC Initial Set (hrs) Final Set (hrs)
Control mix 3 ½ 5 ½
300 cc 1 ¾ 3 ¾
600 cc 1 ¼ 2 ½

Packing & Size

Estop Admix AP 20 litre

Technical Support

Estop offers a technical support package to specifiers, end-users and contractors, as well as on-site technical assistance.


Store in dry & covered condition. Estop Admix AP has a shelf life of 12 months in an unopened container.

If stored in extreme heat condition, the shelf life may be reduced.


Suitable protective gloves and goggles should be worn. If swallowed seek medical advice immediately. Do not induce vomiting.

Additional Information

Estop manufactures and offers a wide range of complementary products, which includes waterstops, waterproofing products, grouts, anchors, specialized flooring products. In addition, a wide range of products formulated for repair and refurbishment of spalled concrete are available.