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  • Shalex Industries Concrete Bond

Concrete Bond

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Shalex Concrete Bond is a new generation high performance acrylic admixture and bonding agent designed to improve the durability, strength and adhesion of concrete.

Concrete Bond can be used as an admix in the preparation of slurries, toppings, screeds, mortars, renders or concrete and will greatly improve cohesive strength, flexibility, adhesive strength and water resistance. When mixed with cement, Concrete Bond forms a strong yet flexible bond and provides a key for cements and mortars over non porous substrates.

Concrete resurfacing mixes or paints made with concrete bond exhibit exceptional flexibility, strength and adhesion.

Unlike many inferior PVA based additives that re-emulsify when wet, Concrete Bond has outstanding water resistance and may be used as a sealer or general bonding agent without mixing with cement. 

Concrete Bond can be used to consolidate and strengthen loose or friable masonry surfaces such as crumbling mortars, screeds and renders. It is non-oxidising, UV stable and dries to a clear finish.

Concrete Bond is compatible with most acrylic tile adhesives and is designed to work in high ph environments and on ‘green’ substrates. 



  • All surfaces should be clean, sound and free from dry or loose material. Check for presence of waxes, mould release or bond breaking agents, oils or other contaminants than may affect adhesion before application. Given the wide variety of substrates and site specific conditions, it is advisable to check adhesion prior to job commencement.

Typical Usage

Shalex Concrete Bond has a broad range of applications. The following ratios are provided as a guide only. Applicators should consider specific site conditions when using this product.


Mortar to masonry bond is developed through absorbtion of water from the mortar into the masonry and cement fines are absorbed along with the water. If suction of the masonry is too high this may not leave enough water to adequately hydrate the mortar. If suction is too low the transfer of cement fines may not be adequate to ensure a sound bond between the masonry and mortar. Concrete Bond will improve adhesion between the masonry and mortar, control moisture loss and improve strength of mortar on drying. As masonry characteristics can vary widely, testing is recommended prior to large scale application, to determine optimal doseage rates and to assess any timing aspects on screeding, floating and sponging.






  Compressive Strength

ASTM C-109

4800psi (35MPa)

  Flexural Strength


1150 psi avg. (8.2 MPa)

  Tensile Strength

ASTM C-190

620 psi (4.1 MPa)

  Sheer Bond Strength

ASTM C-1042

2080 psi avg. (14.2 MPa)

  Results achieved using a modified 1 to 2 (cement to sand) mix with Concrete Bond to required consistency.



 • Flexible concrete resurfacing

 • Admix for rendering over sealed surfaces

 • Repairs to concrete, grouts and mortars

 • Splash or key coat prior to rendering

 • Flexible toppings for driveways or paths

 • Use as a tile adhesive

 • Bedding mortars for roofing

 • Improve water resistance and adhesion of grouts and renders

 • Economical concrete sealer for dusty surfaces

 • Bonding timber, joinery and crafts



 • Complies with AS14781 - chemical mixes for concrete

 • More than doubles flexural strength, impact resistance and bond strength of mortars and concrete

 • Excellent adhesion

 • Superior bond strength

 • Excelent waterproofing characteristics

 • Cost effective concentrated formula with broad range of uses



  Concrete Bond will delay curing by retarding evaporation. If using accelerants or quick set cement this should be considered. While Concrete Bond is compatible with a wide range of accelerants, tests are advised prior to large sacel application to assess performance, curing time, optimal dosage rates, etc.



  The use of Concrete Bond at high concentrations will improve strength, water repellence abd adhesion; but may reduce the workability of the render making it 'stickier' and harder to both screed and float.
  Concrete Bond will assist in controlling cracking and is useful when applying thin section renders over substrates that may exhibit movement.


Admix For Renders


Add 1 part Concrete Bond to 10 parts water and mix well to control shrinkage, reduce water loss and improve strength on curing.

Rendering over previously painted surfaces


Add 1 part Concrete Bond to 4 parts water and apply a thin coat. When dry use as an admix in top coat of render (as above) or use a polymer modified bagged render.

Thin section renders (<3mm)


Add 1 part Concrete Bond to 3 parts water and mix render to desired consistency to control cracking. When rendering over smooth surfaces eg FC sheet, a splash or key coat is recommended before applying thin set renders.

Splash or key coat for rendering


Add 1 part sand, 1 part cement and 1 cup (approx. 300ml) Concrete Bond and then add water to achieve desired consistency. Allow splash coat to dry before applying render coat.

Flexible Toppings

Concrete Bond can be mixed with cement or stencil crete dry mixes to form a decorative topping that exhibits exceptional flexibility, strength and adhesion. Each mix and cement type will vary so trials are recommended to obtain the best balance of cost, strength and flexibility. Graded sand may also be added however these reduce strength of the topping and larger sand particles will create a rougher texture than using cement alone.

Mix the following ratios: 


Concrete Bond 7 litres and clean water 1 litre. Add to 1 x 20kg bag of cement until desired consistency is achieved. This mix may be applied by trowel, spatula, brush, roller or through a hopper gun. Colour oxides may be used as required.

Allow at least 4 hours to dry (at 24°C) before walking over and keep heavy vehicles off for at least 48 hours.

Some experimentation may be required to achieve the best result. Adding a higher ratio of water to Concrete Bond will reduce flexibility of the topping and result in a harder coating. Coloured oxides can also be added and should be pre-mixed with the dry ingredients prior to adding the wet ingredients. When using coloured oxides add up to 10% of cement weight to dry mix eg for each 20kg bag of cement, add 2kg of oxide and premix well before adding wet ingredients.

  Note: Ensure all lumps are removed and cement or dry-mix is fully 'wet out'. Sieving the dry ingredients through a mesh screen may assist in removing lumps to ensure a homogenous mix.

Patching Concrete



Dilute 3 parts Concrete Bond with 1 part water and brush on to all surfaces of the area being repaired. Allow to dry before patching. 



Add 1 part Concrete Bond to 4 parts water and add to cement or mortar mix.

  Note: If patching off-form or tilt-panel concrete, ensure all release agents are removed from the surface prior to applicatin as these may interfere with adhesion.

  Dusty surfaces should be washed down first.


Tile Grout


Dilute 1 part Concrete Bond with 10 parts water. 

Mix 1 part cement to 3 parts fine sand and coloured oxides if required (add oxides at up to 10% of cement weight).

Mix wet and dry ingredients well before use.

  Note: Care should be taken to wet porous tile surfaces to prevent oxides being absorbed into the face of the tiles.

  Remove and unwanted grouting mix from tile surfaces promptly.


Tile Adhesive


Dilute 1 part Concrete Bond with 4 parts water. 

Mix 1 part cement to 2 parts fine sand 

Add wet ingredients to dry mix to achieve desired consistency. Let stand for 5 minutes, mix again and add more wet ingredients if required. 

Flexible Roof Pointing / Bedding Mixes


Dilute 1 part Concrete Bond with 1 part water. 

Mix 1 part cement to 6 parts sand and coloured oxides if required (add oxides at up to 10% of cement weight).

Mix well and apply with spatula or trowel, packing into all voids. Wet spatula and rub over surface to obtain a smooth finish.

This mix is suitable for application on porous terracotta or cement roof tiles. For non-porous or glazed roofing tiles first apply a neat coat of Concrete Bond to all surfaces with a brush and allow to dry before applying the bedding mix.

Adding more cement in place of sand will result in a more rigid pointing.

  Note: Ensure all lumps are removed and cement or dry mix is fully 'wet out'. Sieving the dry ingredients through a mesh screen may assist in removing lumps to ensure a homogenous mix.


Sealing Concrete Floors



Apply a coat of Concrete Bond diluted 1 part to 5 parts water. 

2nd coat


Allow to dry and apply second coat diluted 1 part to 3 parts water.

Consolidate Friable Masonry


Concrete bond is an effective solution to consolidating old and crumbling masonry. It will soak in and bind loose particles together, providing a tough yet flexible bond.

Apply a diluted coat of Concrete Bond diluted 1 part to 6 parts water. Apply slowly to ensure surface is wet out thoroughly and reapply to soak affected area while still wet. Avoid over application on vertical surfaces such as bricks and wipe off runs from surfaces and from non-porous materials.


Concrete Bond can be used in place of PVA style wood glue for arts, crafts and timber joinery work. Concrete Bond has superior strength, adhesion and water resistance than most PVA’s while retaining some flexibility to accommodate movement. Apply neat concrete bond to both surfaces and clamp together until set. Small amounts applied to both surfaces provide the best result and will cure more rapidly. Avoid using as a gap filler as this will result in greatly extended curing times.


  Usage Rate:

1 part Concrete Bond to 4 parts water


1L = approx 5m²

  Drying Time:

When used as a sealer over a concrete surface:

Recoat - 1 - 2 hours

Dry -      4 - 8 hours

  Fully Cured:

Cures with cement, mortar or concrete

  Cleean Up:

When wet: water

When dry:  solvent

  Shelf Life:

12 - 18 months

  Store Below:


  Application Temperature:

5°C - 35°C


Mix into gauging water when preparing cements or mortar mixes

or apply with sprayer, brush or roller




Pail Sizes

125ml Trial Pack, 1Ltr, 5Ltr, 15Ltr, 200Ltr, 1000Ltr


150g, 1.1kg, 5.5kg, 16.5kg, 224kg, 1060Kg

Dangerous Goods Class


Customers are advised to consider the information in this data sheet in the context of how the product will be used, including surfaces and any other products used. The information provided in this data sheet represents our best scientific and practical knowledge. Any advice, information or assistance provided by Shalex in relation to its products is given in good faith, however is provided without liability or responsibility. Due to the wide variety of site conditions we are unable to assume liability for any loss that may arise from the use of our products. The user is responsible for checking the suitability of products for their intended use.




Concrete Bond is a water based sealer and not classified as a dangerous good for transportation. We can ship this product to all areas via postal services and have express courier options for selected locations. Add this product to your cart and use the estimate shipping and tax feature to view shipping charges to your location.

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