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Parchem Vandex BB75E-Z

Active Crack-Accommodating Cementitious Render Waterproofing Barrier for Positive and Negative Applications

Vandex BB75E-Z is a ready-mixed, two component, polymer modified, cementitious, waterproofing membrane which is made by mixing Vandex BB75-Z with Vandex Elasticiser PK 75. The BB75-Z powder component consists of grey sulphate resistant cement, graded quartz sands and inorganic additives. The Elasticiser PK 75 is the polymer component. Vandex BB75E-Z is waterproof and has been tested to a pressure of 7.0 bar (70 m water head). The initial and final bonding capability of BB75E-Z is excellent, making it suitable for application to both vertical and horizontal surfaces. It is durable, resistant to frost and heat after setting and remains permeable to water vapour.
  • Overview

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  • Description

    USES

    Waterproofing of concrete and masonry structures both new and old where live cracks are present. Vandex BB75E-Z is a flexible cementitious membrane and does not rely on crystal growth to achieve its waterproofing. As a result, BB75E-Z can be used on most masonry surfaces, including sandstone, provided that the surfaces are adequately prepared. Vandex BB75E-Z has been formulated using sulphate resisting cement making it ideal for application in sewerage environments. It can be applied to either the pressure or non-pressure faces of the concrete or masonry. Vandex BB75E-Z is excellent for solving the problem of water seepage through concrete and masonry where live cracks are present in both new and old structures. Vandex BB75E-Z is ideal in applications where the high pressure face is not easily accessible. It is also ideal for waterproofing the inside face of swimming pools, sewerage processing tanks, concrete block walls and any masonry surface where crystal growth waterproofing will not be effective due to a lack of alkalinity in the substrate. Other applications include; basement walls, lift pits, water storage and drainage tanks, sewer aqueducts etc.

    FEATURES

    • Permanently flexible and accommodates dynamic crack movement up to 0.5 mm
    • Applied to either the pressure or non pressure face of concrete
    • Based on sulphate resisting cement making it suitable for use in sewerage processing tanks
    • Works on masonry, brick, stone and concrete blocks where crystal growth treatments are not effective
    • Approved for potable water contact
    • Non-toxic
    • Suitable for permanent sunlight exposure after curing
    • Tested to withstand a water head of 70 metres
    • Colour compatible with the host concrete
    • Can be applied to damp concrete

    LIMITATIONS

    Live cracks can be waterproofed with Vandex BB75E-Z provided that the maximum crack movement does not exceed 0.5 mm. In the event of larger crack movement, consult your local Parchem sales office for advice regarding the most appropriate waterproofing system.

    Static cracks wider than 0.5 mm must be routed out to form a V-shaped groove with a hand or power chisel to a depth and width of approximately 25 mm. These larger cracks must be repaired by priming the chiselled out crack with 2 coats of Vandex Concrete Grey, followed by the application of Vandex Uni Mortar 1-Z to fill the rebate flush with the concrete surface. All of the above products must be installed green on green, before the previous layer has dried out.

    All water seepage must be stopped using Vandex Plug prior to the application of Vandex BB75E-Z. Do not attempt to apply BB75E-Z over weeping or seeping substrates no matter how slow the seepage, as the BB75E-Z will be damaged by the seepage water before it has a chance to cure.

    Surfaces treated with Vandex BB75E-Z must be protected from rain, ponded water and the drying action of direct sunlight for a minimum period of 5 days after application. Protect all treated surfaces from wind, frost, rain and water seepage by covering with plastic sheeting, tarpaulin or equivalent.

    All water seepage must be stopped using Vandex Plug prior to the application of Vandex BB75E-Z. Do not attempt to apply BB75E-Z over weeping or seeping substrates no matter how slow the seepage, as the BB75E-Z will be damaged by the seepage water before it has a chance to cure.

    Consult Parchem for specific advise on the use of Vandex BB75E-Z in closed sewerage environments where sulphuric acid concentrations may be high.

  • Performance

  • Compliances and Accreditations

    Compliances

    • AS 4020 (not verified by SpecCave)
  • Systems & Installation

    Systems

    Priming is not required on good quality concrete substrates. All surfaces must be pre-watered before applying Vandex BB75E-Z.

    In most waterproofing applications, Vandex BB75E-Z is applied in two coats by brush, trowel or spray.

    Specific minimum application rates are as follows;

    Ground moisture - 2 coats by brush, trowel or spray at an application rate of 2.0 kg / m² / coat. (Total minimum layer thickness for 2 coats must be 2.0 mm).

    Pressureless surface water - 2 coats by brush, trowel or spray at an application rate of 2.0 kg / m² / coat. (Total minimum layer thickness for 2 coats must be 2.0 mm).

    Water under pressure - 2 coats by brush, trowel or spray at an application rate of 2.5 kg / m² / coat. (Total minimum layer thickness for 2 coats must be 2.5 mm).

    Note: the maximum total thickness of all coats of the BB75E-Z system should not exceed 4 mm.

    Curing: Surfaces treated with Vandex BB75E-Z must be protected from rain, ponded water and the drying action of direct sunlight for a minimum period of 5-14 days after application.

    Installation

    Click to download: Vandex Application Guide

  • Compatible Products

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  • Spec Clause

    Spec Clause

    Where so designated on the drawings, surfaces to be waterproofed shall have a surface applied, flexible cementitious waterproofing membrane installed. The waterproofing product will be produced by mixing a cementitious powder component with a liquid polymer component. The waterproofing must form an impermeable layer on the surface of the substrate and must not rely on crystal growth within the substrate in order to be effective. The waterproofing treatment must be flexible and be capable of accommodating long term cyclic crack movement up to 0.5 mm without any loss of waterproofing integrity. It must have a proven capability of sustaining pressures of 7.0 bar (70 metre water head) even after sustaining 0.5 mm cyclic crack movement. The setting time for the waterproofing must be in the range 3 - 4 hours and the bulk density of the mixed product must be in the range 1.80 - 2.20 kg / litre.

    The cementitious waterproofing membrane must be non toxic and be capable of being applied to concrete and masonry surfaces by trowel, or as a slurry by brush or by spray application through a hopper gun. The waterproofing must be installed by a prequalified contractor nominated by the supplier and both the manufacturer and supplier must be accredited to ISO9001. Vandex BB75E-Z supplied by Parchem is such a product.

    See Downloads section for detailed spec sheet.

  • Stockists & Pricing

  • Projects & Installers

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  • Downloads

    Parchem Vandex BB75E-Z

    Active Crack-Accommodating Cementitious Render Waterproofing Barrier for Positive and Negative Applications

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