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Estobond Acryl

Acrylic Emulsion Bonding Agent

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Estobond Acryl

Acrylic Emulsion Bonding Agent


Estobond Acryl is a single component white, milky emulsion based upon modified acrylic type resins.

It is formulated for use with Estopatch concrete repair mortar system and as a bonding agent for concrete and mortar.

It is resistant to hydrolysis and therefore can be used in external or internal applications.

Estobond Acryl has been tested by SIRIM BHD in accordance to BS 5350 Part C15 : 1990, on Determination of Bond Strength in Compressive Shear, and complied with the specification in this data sheet.


Estobond Acryl is a bonding agent for Estopatch concrete repair system. It may also use as bonding agent for concrete and cement/ sand mortar. It acts as curing compound when sprayed onto freshly applied repair patches.


  • Single component.
  • Long open times, designed for ease of use under site condition.
  • Excellent bond strength between polymers modified mortars and concrete.
  • Cost effective and economical in use
  • Can be used as curing membranes for Estopatch material Water resistant, can be used internally and externally with complete safely.

Standards Compliance

  •  BS 7542:1992
  • BS 6319
  • BS 5350:Part C15:1990

Physical Properties

Bond Strength  In  Compressive  Shear, > 15
BS 5350:Part C15:1990
Curing Efficiency Test
BS 7542:1992 > 55%

Application instructions

(A)  As a bonding agent


Successful repairs to reinforced concrete depend on correct surface preparation. Mechanically remove all loose or damaged concrete exposing the full circumference of any corroded reinforcing steel. It is recommended that all repair areas should be defined by a 10mm saw cut to avoid “feather edging” of the repair mortars. Finally pre-soak the repair zone with copious amounts of clean water preferably for a minimum of 1 hour prior to application of the Estobond Acryl. Remove excess surface water with a stiff brush.


Estobond Acryl is supplied ready for use. Do not dilute with water or solvents of any kind. Pour milky liquid into suitable container ready for application onto previously prepared substrate.


Estobond Acryl is simply applied by brush ensuring the complete surface is wetted out. Use of a “stippling” action rather than a “painting” action is recommended. The Estopatch repair mortars or concrete should be applied immediately.


Do not over apply Estobond Acryl as slippage of the repair mortar may occur in high build applications.

In vertical and overhead applications, whilst laboratory tests show that bond strengths are not greatly affected even after Estobond Acryl is allowed to dry for 24 hours, practical difficulties of maintaining compaction onto the dry primer layer will reduce the build which can be achieved with Estopatch material. It is recommended therefore that should Estobond Acryl dry longer than 8 hours at 20 C, a fresh coat be applied.

(B)  As a cement modifier

Estobond Acryl is used as cement modifier to improve the properties of patching mortars and renders.

The recommended mix designs

OPC:                           50 kg

Zone 2 sand:             150 kg

Estobond Acryl:       10 litres

Water:                         add sufficiently to give required


Typical results of above mixing mortar:

Compressive Strength (N/mm2),
BS 6319
Control 35
Treated with Estobond Acryl 40
Tensile Strength (N/mm2),
Control 4.0
Treated with Estobond Acryl 4.5
Flexural Strength (N/mm2),
BS 6319
Control 8.0
Treated with Estobond Acryl 11.0
Adhesion to Concrete (N/mm2) – Slant Shear
BS 6319
Control 5.0
Treated with Estobond Acryl 20.0

Packing & Size

Estobond Acryl 20 litre pail
200 litre Drum
Estobond Acryl 4 – 6 m2 per litre depend on
porosity of substrate

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. Estobond Acryl has a shelf life of 12 months in an unopened container.

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


Estobond Acryl is non-toxic. It is slightly alkaline; therefore, skin contact shall be avoided. Wear gloves and protective clothing.

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.