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Isocrete SBR

Isocrete SBR   Latex based bonding agent

Isocrete SBR is a white milky liquid, which has numerous uses as an admixture, primer, bonding agent and sealer.Polymer Emulsions of this type have been used extensively in the building industry as an admixture for cement and concrete applications, including repair and renovation, surfacing of floors and bonding generally.  It contains anti-foam to control the density of cementitous mixes. 


  • Greatly improved adhesion to a wide range of substrates including dense concrete, steel, tiles etc.
  • Compatible with all types of cement
  • Excellent resistance to water and water vapour
  • A high level of resistance to salt permeation
  • Much improved toughness and flexibility
  • Reduced surface dusting of concrete
  • Greatly improved resistance to many chemicals
  • Reduced water: cement ratio for equivalent workability
  • Improved frost resistance
  • Can be used for potable water applications 


Areas For Use

  • As an admixture for mortar/screeds/renders.
  • As a bonding agent for screeds/renders.
  • As a primer/sealer in tiling applications.
  • As a flexibliser for cementicious based tile adhesive when tiling on wooden/asphalt floors.
  • In addition, SBR Bond has the advantage over PVA bonding aids in that it is not adversely affected in wet conditions


Surface Preparation

All surfaces must be clean, dry and free from dust, grease and other contaminents. 



This concerns the use of Isocrete SBR in screeds and toppings over background concrete. Adding Isocrete SBR to a floor screed or topping gives the following advantages: 

  • A low water:cement ratio allows a minimum of delay when overcoating is required.
  • Reduced permeability to liquids.
  • Improved chemical, abrasion and impact resistance .
  • Resistance to dusting.
  • Thinner screeds, achieving reduction in weight and savings in materials.
  • Excellent slip resistance.
  • Goods underlay for epoxy surfacing.  


Floors should be mechanically prepared, eg scabbled or shot blasted, to give an aggregate exposed surface.  Dust should be removed by vacuum, not compressed air.  All contaminants such as oil, grease, or any surface laitence must be removed to ensure adequate development of bond when the topping is applied.  A water drop test is the simplest method to determine whether water

repellent contamination is present. 


Application of a primer coat is necessary to obtain maximum adhesion of the topping or screed. 



The mix design depends upon thickness and intended use.  However, typically mixes for a 12mm topping or screed are as follows:-








Moist Sand



3mm Washed Granite



SBR Bond


0.2 (ie 10 litres per 50kg bag of cement)


As required

As required

All parts are by volume of uncompacted material. 



As a rough guide, 1.2 litres of SBR BOND will cover 1m² of 12mm thickness using the above mixes.



Mixing procedures for topping and screeds containing Isocrete SBR are similar to those used to conventional compositions, with gauging water partly replaced by Isocrete SBR.  However, mixing time should be minimised to limit air entrainment.


Mixing should be carried out in a forced action mixer.  The usual procedures is to pre-mix sand and cement in the mixer, pour in the Isocrete SBR, mix for 1 - 3 mins, then slowly add water to the required consistency.



The mix has a pot life of approximately 40 minutes and batch size should be calculated accordingly.



  1. Apply topping or screed onto wet or tacky primer.
  2. Compact and level with screed bar.
  3. Finish with steel float.  It is essential that the topping or screed is finished as the work proceeds.
  4. The topping or screed would be cured for 1 - 2 days using conventional techniques.  Curing should be started quickly after application.




All tools should be cleaned immediately after use with water because hardened SBR Bond modified toppings and screeds have excellent adhesion and are therefore difficult to remove.  Solvents such as white spirit used with coarse wire wool help to remove partially hardened mortar.

 Specific Data

Total Solids



9.0 – 10


100cps (RVT 1/10rpm)

Surface Tension

8 dyne/cm

Specific Gravity

1.010 Kg/Ltr


 Milk white

Na20 Equivalent

Passes 5 cycles at -10°C – excellent

Calcium Ions


Aluminium III Ions






Tensile Strength

N/mm² at 15% elongation

Tensile Strength @ Break


Elongation @ Break


Solubility Of Dry Film In Toluene



Shelf Life

 12 months from date of manufacture in original unopened containers. 


  • Health & Safety 
  • Store away from sunlight, UV and other sources of light
  • Shelf life is 12 months if stored as per recommendation
  • Avoid contact with eyes and prolonged contact with skin.
  • For eyes flush immediately with water for 15 minutes and call a physician.
  • Protective clothing such as gloves and goggles should be worn when handling the product.
  • Keep containers tightly closed when not in use.

Packing . 200Litre drum 

Conditions of Use and Disclaimer The information contained in this Material Data Sheet is given in good faith based upon our current knowledge and does not imply warranty, expressed or implied. The information is provided and the product is sold on the basis that the product is used for its intended purpose and is used in a proper workmanlike manner in accordance with the instructions of the Product Data Sheet in suitable and safe working conditions. Under no circumstances will the Company be liable for loss, consequential or otherwise, arising from the use of the product.