Negative Waterproofing

Adheseal's Negative Waterproofing - Class C range provides a robust barrier against hydrostatic pressure, essential for protecting below-ground structures. This system is designed for interior application to resist water penetration through concrete and masonry, safeguarding against dampness and structural damage. Ideal for basements, lift pits, and retaining walls, our Class...

Adheseal's Negative Waterproofing - Class C range provides a robust barrier against hydrostatic pressure, essential for protecting below-ground structures. This system is designed for interior application to resist water penetration through concrete and masonry, safeguarding against dampness and structural damage. Ideal for basements, lift pits, and retaining walls, our Class C solutions offer superior protection in high-moisture environments. This product range is formulated for professional application, ensuring reliable and long-lasting results.

Use Negative Waterproofing - Class C for: Preventing water ingress in basements, lift pits, and retaining walls under high hydrostatic pressure.

Key Features

  • High resistance to hydrostatic pressure
  • Suitable for interior application
  • Excellent adhesion to concrete and masonry
  • Durable and long-lasting protection
  • Reduces dampness and mould growth
  • Compatible with various substrates
  • Formulated for professional use
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  • Everflex VBS
      Adheseal
      Everflex VBS
      Everflex VBS is a high-performance 2-part water-based epoxy system that functions as both a vapour barrier and primer. Formulated for internal and external use, it is ideal for damp substrates, green concrete, and as a negative waterproofing solution (up to 250kPa). With low VOC content, fast drying time, and excellent adhesion to concrete, screeds, masonry, and timber, Everflex VBS is suitable for a wide range of applications including waterproofing membranes, self-levelling systems, and flooring. It resists re-emulsification, inhibits mould, and meets Green Star environmental criteria.
      $364.85
      $364.85
    • Gripset C-1PGripset C-1P
        Gripset
        Gripset C-1P
        Gripset C-1P is a high-performance, fibre-reinforced, flexible cementitious waterproof membrane designed for both positive and negative waterproofing. With excellent crack-bridging, hydrostatic pressure resistance up to 5 bar, and compliance to AS4858, it’s ideal for basements, pools, potable water tanks, wet areas, and under-tile systems in Australian commercial, industrial, and residential projects.
        $133.22
        $133.22
      • Gripset C-Plug
        Gripset
        Gripset C-Plug
        Gripset C-PLUG is a rapid-set, non-shrink cementitious plugging compound for active water leaks under pressure. Initial set occurs in about a minute with full set in 2–4 minutes, curing to the mechanical strength of concrete. Ideal for holes, cracks and joints in concrete and masonry across basements, lift pits, tanks and tunnels. Non-toxic, non-staining and grindable to contour; can be used with Gripset C-1P for long-term negative-side waterproofing.
        From $46.25
        From $46.25
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      • Mountain Grout Gel Foam
        Green Mountain International
        Mountain Grout Gel Foam
        Mountain Grout Gel Foam is a low-viscosity, single-component hydrophilic polyurethane injection resin for active leak repairs in concrete. It reacts with water to form a foam or gel (depending on water availability), delivering high elongation sealing performance with up to 25× expansion for dependable infiltration cut-off in cracks and joints. 100% solids, no VOCs, and engineered for durable, inert seals under continuous moisture exposure.
        From $180.40
        From $180.40
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      • Mountain Grout Flexible
        Green Mountain International
        Mountain Grout Flexible
        Mountain Grout Flexible is a single-component, low-viscosity hydrophobic polyurethane injection resin used to permanently seal leaking cracks, voids, or fractures in concrete structures. Activated with water, it expands up to 30 times its initial volume to form a durable, closed-cell grout with excellent adhesion and resistance to wet/dry cycles. Reaction times can be controlled with the optional Accelerator “B” component, providing professional applicators with the flexibility to adapt to site conditions.
        From $180.40
        From $180.40
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      • Mapei Lamposilex (Waterplug)
          Mapei
          Mapei Lamposilex (Waterplug)
          Ultra-fast setting hydraulic binder for instantly stopping active water leaks, even under pressure. Plastic-thixotropic paste applies easily on verticals, sets in ~1.5 minutes at +20 °C, reaches high early strength, waterproof and water-repellent, and is suitable for potable water systems (AS/NZS 4020).
          From $47.17
          From $47.17
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        • Megapoxy HMegapoxy H
          Megapoxy
          Megapoxy H
          Megapoxy H is a low-viscosity, hydrophilic epoxy resin ideal for various applications, including bonding new to old concrete, crack repair, and underwater repairs. This versatile, 100% solids, solvent-free formula offers excellent mechanical properties and can be used with fine aggregates to create high-strength epoxy mortar. Megapoxy H is VOC-free and complies with AS/NZS 4020 for potable water contact, making it a safe and reliable choice for various projects.
          From $148.50
          From $148.50
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        • Gripset E-60Gripset E-60
          Gripset
          Gripset E-60
          Gripset E60 is a two-component, water-based epoxy primer and moisture/vapour barrier for mineral substrates. It can be applied to damp or “green” concrete, resists up to 25 m water head (≈250 kPa), and is AS 4020 compliant for potable water. Pot life ~2 h; recoat ~4 h; overcoat at ~24 h; immersion after 7 days.
          From $94.57
          From $94.57
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