PREBAR PVC Waterstop Rear Guard (External) for external concrete construction joints, providing reliable watertight sealing and waterproof detailing.
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PREBAR PVC Waterstop External (Rear Guard)

Sale price$242.00
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PREBAR PVC Waterstop is a high-performance thermoplastic PVC profile designed for watertight sealing in cast-in-situ concrete joints, including external rear guard applications. It is compliant with BS 2782 and is suitable for both construction and expansion joints in horizontal and vertical installations. This heat-weldable waterstop ensures seamless on-site joining and comes in various profiles with prefabricated intersections for easy installation. Highly durable, it resists water, chemicals, and environmental factors, providing reliable, long-lasting waterproofing in critical structures, including areas exposed to external conditions.

Size: 150mm X 15m
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Pickup available at The Waterproofing Shop

Usually ready in 24 hours

PREBAR PVC Waterstop Rear Guard (External) for external concrete construction joints, providing reliable watertight sealing and waterproof detailing.

PREBAR PVC Waterstop External (Rear Guard)

150mm X 15m

The Waterproofing Shop

Pickup available, usually ready in 24 hours

22/872 Canterbury Road
Roselands NSW 2196
Australia

+61280213517
PREBAR PVC Waterstop External (Rear Guard)150mm X 15m
$242.00
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Correct application makes all the difference.

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How to install

Watch the install

Step-by-step from prep to top coat. Filmed on the tools, not in a studio.

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Frequently asked questions

View all FAQs
  • What is PREBAR External (Rear Guard) used for?
    Compatibility

    PREBAR External is the rear-fixed variant of the PREBAR PVC Waterstop - fixed against formwork on the outer face of the joint rather than centrally embedded. Used where post-applied waterstop placement is preferred over central embedment.

  • How is it installed?
    Installation

    Nail or fix the external waterstop to the formwork prior to concrete pour. The ribbed wing sits against the external face of the joint. Heat-weld splices for continuous runs. Strip the formwork after the concrete cures.

  • Same material as internal PREBAR?
    Performance

    Yes. Same PVC material as Internal PREBAR: Shore A 75 hardness, 330% elongation, service temperature -20°C to +50°C. The difference is the profile shape - external has flanges for surface fixing, internal has a centred barrier shape.

  • When use external vs internal?
    Compatibility

    Use external when access for centring an internal waterstop is impractical (one-side formwork, retrofit applications), or when belt-and-braces detailing requires both internal and external waterstops at the same joint.

  • Pairs with which Forspec products?
    Compliance

    External PREBAR works with PRESWELL hydrophilic strips and Forspec liquid-applied membranes for full structural joint waterproofing systems. Reference the Forspec design library for compliant assemblies.

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