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Estop Water Plug compound

Fast Setting, Hydraulic Cementitious Mortar

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Estop Water Plugcompound

Fast Setting, Hydraulic Cementitious Mortar


Estop Water Plugcompound is a fast set chloride free hydraulic cement mortar. It is in pre-packed powder form  and  when mixed with water, it becomes a powerful, fast setting  permanent Water Plug.

Estop Water Plugcompound is ideal to stop  water  leakage through concrete and masonry instantly with  excellent structural strength and water tightness.


Estop Water Plugcompound has been tested by SIRIM BHD, in accordance to BS 6319 Part 2:1983, on Compressive Strength Test and complied with the specification in this data sheet.



Estop Water Plugcompound is use to stop pressure leaks and seepage through rock and concrete, as well as through joints between concrete and steel. It is widely being recommended for: –

  • Stopping leaks in subways, culverts, tunnels, dams, basements, water tank and swimming pools, etc
  • Repairing honeycombs, cracks and spalls
  • Filling holes left by tie wires
  • Making rigid joints watertight
  • Repairing water retaining structures


  • Easy to use & mix.
  • No special equipment required.
  • Very fast setting with rapid strength development
  • Permanent solution
  • Good adhesion to all substrates.
  • Remarkable water-stopping power and hydraulic resistance
  • No cracking
  • Non corrosive
  • Non shrink and expands as it sets
  • Non toxic when it set

Standards Compliance

  • ASTM C942
  • ASTM C940

Physical Properties

Time Of Hardening at 25 ˚C < 180 seconds
Water Powder Ratio 0.31
Fresh Weight Density (kg/litre) 2.8
Colour Grey
Appearance after repair Coarse
pH >7
At Water Powder Ratio of 0.31
Compressive Strength (N/mm2) 30 mins

1 day

3 days

28 days


> 10

> 13

> 23

> 35

Application Instructions Preparation

Areas to be patched should be cut in “U’ shape at the leaking point to a depth of 25mm and to give a good mechanical key. Feather edges must not be allowed.

Surface should be brushed clean to remove loose material, dust and laitance. Grease lime or mould growth should be removed by steam cleaning or high pressure water jetting.


Clean water should be added to Estop Water Plugcompound in proportions of 1 part clean water : 3 parts Estop Water Plugcompound (measure by Volume), or 1 litre water : 3.2 kg of Estop Water Plugcompound.

Mix to a stiff consistency in a suitable mixing drum or bucket, using a trowel. Due to the rapid set characteristics of the product, only prepare a quantity of mortar, which can be placed within the prescribed set time.


The surface of application should be wetted and ensure maximum contact with the substrate before the material sets. Estop Water Plugcompound should be used and held in place until the initial set is reached.

Minimum thickness of Estop Water Plugcompound  is at 15mm. For application above 50mm deep,  Estop Water   Plugcompound

can be applied in 50mm layers provided being pre-wetted before applying following layers.


Estop Water Plugcompound should be removed from tools, equipment and mixers with clean water prior to the initial set. Cured material can only be removed mechanically.

Packing & Size

Estop Water Plugcompound 5 kg tin



Estop Water Plugcompound 5 kg tin is approximately 2.5 litre

                                                               in volume after mixing



Estop Water Plugcompound 0.15m2  at 15mm thick

Technical Support

Estop offers a comprehensive range of high performance, high quality of repair product for both new and existing concrete surfaces. In addition, the company offers a technical support package to specifies, end-users and contractors, as well as on- site technical assistance.


Estop Water Plugcompound should be stored on pallets in dry conditions and temperature below 35˚C. Under these  conditions the product will have a shelf life of 12 months.

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


Estop Water Plugcompound contains cement powder which when mixed with water, release alkalis, which can be harmful to the skin. Wear suitable protective gloves, clothing, eyes protection and respiratory protective equipment. If swallowed, seek medical attention 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.