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POLYBIT Polybond AC

Acrylic based bonding agent

  • Improves bond, flexural and tensile strength of
    cementitious mixes
  • Reduces the permeability of mortar
  • Single component, easy to apply

Features and benefits

It is a single component, acrylic polymer based emulsion, designed as an admixture for cementitous mortars and screeds and as a bonding and curing agent for concrete and patch repairs.

Properties

Description

POLYBIT® POLYBOND AC is used as a bonding agent for bonding new concrete to old concrete; bonding agent in high strength repair and patching mortar; bonding agent for GRC mixes; bonding / curing agent for Polycrete* repair systems. Available pack size: 20L pail, 200L drum.

Documents and downloads

How to use

SUBSTRATE PREPARATION

Surface to which Polybond AC mixes are to be applied should be clean, sound and free of loosely adhering material. Remove all laitance, oil, grease, mould oil or curing compound from concrete surface using wire brush, bush hammer or by blasting. Ensure that 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 substrate.

APPLICATION

Bonding slurry
Wet down absorbent surfaces, such as concrete, brick, stone, ensuring that they are fully saturated but free of surface water. Prepare a bonding slurry of 1 to 2 parts cement to 1 part of Polybond AC mixed to a lump- free creamy consistency. 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 coat to ensure complete coverage. the mixed bonding slurry should be applied at 1- 2 kg/m2. For bonding of patch repairs using Polycrete repair mortars apply undiluted at 5 to 6 m²/L.
Polybond AC modified mixes:
Sand: Sand should be washed and well graded. cement: Polybond AC is compatible with all types of opc, sulphate resisting and high alumina cements. Water: The strong plasticizing action of Polybond AC greatly reduces the water cement ratio for any given workability.
Polybond AC: Standard dose is 5-8L per 50 kg of cement used. For more demanding situations, and greater exposure to aggressive environment 15L per 50 kg of cement is recommended. Mixing should be carried out in an efficient concrete mixer. Charge the mixer with required quantity of sand and cement and premix for approximately one minute. Pour the required quantity of Polybond AC and mix for two minutes only to avoid excessive air entrainment. Add the water slowly until the required consistency is achieved. Avoid adding excessive water.
Render to vertical surfaces:
Apply the bonding slurry to the prepared surface and then render immediately with Polybond AC 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 topping Screeds, patches based on Polybond AC modified mix should be placed over the tacky bonding slurry, well compacted and struck off to level. It may me trowelled to the required finish using a steel trowel. 

STORAGE & SHELF LIFE

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 condition 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 an acrylic bonding agent

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

Yes it is green product with very low VOC content