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POLYBIT Polybond SBR

SBR based bonding agent and admixture

  • Enhances the flexural and tensile strength of the mortar and render
  • Provides good resistance to water and moisture vapour transmission
  • Improves the chemical and abrasion resistant properties of the mortar

Features and benefits

SBR based bonding agent and admixture used in mortar and concrete as an admixture and bonding agent to increase its water resistance and durability.

Properties

Description

POLYBIT® POLYBOND SBR is suitable for bonding of new to old concrete, tile bedding and fixing of slip bricks; waterproofing of basements, swimming pools, potable water tanks, sludge tanks & ducts, tunnels and underpasses; waterproof/protective slurries of potable water tanks, sewerage and mild chemical holding tanks, porous concrete; repair of concrete; admixture for cementitious systems and tile adhesives/grouts, improves the durability, water proofing and abrasion resistance properties of mortars. Available pack size: 5L, 20L, 200L.

Documents and downloads

How to use

Surface Preparation

Surface to which Polybond SBR mixes are to be applied shall be clean, sound and free of all loose particles. Remove all laitance, oil & grease, mould oil, curing compound from surface. Ensure that the exposed reinforcing steel is clean and free from scale and rust. When repairing damaged concrete, ensure that the concrete has been cut back to thoroughly sound material.

Application

Bonding slurry
Saturate absorbent surfaces with water completely till it reaches a saturate surface dry condition. However, ensure that the surface is free of standing water. Prepare a bonding slurry by mixing 2 parts O.P. cement to 1 part of Polybond SBR (by volume). Using a stiff brush, work the bonding slurry well into the damp surface, ensuring that no pinholes are visible. Do not apply bonding slurry at a thickness in excess of 2mm. If a second coat is necessary, it must be applied at right angles to the first to ensure complete coverage.
SBR modified mixes Sand:
Sand should be washed and well graded Cement: Polybond SBR is compatible with all types of opc, SRC and high alumina cements. Water: The strong plasticizing action of Polybond SBR greatly reduces the water cement ratio for any given workability. Polybond SBR: Minimum dosage of 10L per 50kg of cement is recommended to be used. For more demanding situations 15L per 50 kg of cement is recommended. Mixing should be carried out in an efficient concrete mixer - where available a pan type mixer is recommended. Pour the required quantity of sand and cement and premix for approximately one minute. Pour the required quantity of Polybond SBR and mix for two minutes. Add the water slowly until the required consistency is achieved. Avoid adding excessive water which will result in segregation and bleeding.
Render to vertical surfaces
Apply the bonding slurry to the prepared surface and then render immediately with Polybond SBR modified mortar. Apply in coats to a maximum thickness of 5mm per coat. Several coats can be applied at intervals of 20-30 minutes. Thicker coating can be applied when suitable form work is used. Finish the surface using wooden float or steel trowel.
Screeds and toppings
Screeds based on Polybond SBR modified mix should be placed over the wet bonding slurry, well compacted and struck off to level. It may be trowelled to the required finish using a steel trowel. 

Finishing

Store in a cool, dry place and keep away from all sources of heat and sunlight. In tropical climates, store in air condition rooms. The shelf life is up to 12 months in unopened conditions and if stored as per recommendations. excessive exposure to sunlight, humidity and UV will result in the deterioration of the quality of the product and reduce its shelf life. 

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Frequently asked questions

This is a SBR based bonding agent

This can be applied as a coating or by making bonding slurry

Yes it is green product with very low VOC content