WP512 Waterproofing Planter Box – Concrete or Blockwork (APP Torch Applied)


  1. All surfaces to be waterproofed must be firm, clean, dry, sound and smooth. All grease, oil, wax, curing compounds, loose material, paint and any other contaminants must be removed, masonry surfaces must be pointed flush and surface defects repaired. New concrete must be cured for a minimum of 28 days.
  2. External corners to be waterproofed must be bevelled to ensure a smooth transition of membrane from vertical to horizontal surfaces.



  1. Waterproofing installation shall be in accordance with AS 4654.2 Waterproofing Membranes for External Above-Ground Use.
  2. Repair all surface defects with Aftek Penapatch Structural HB80.

    Aftek Penapatch Structural HB80 is a high strength; high build shrinkage compensated structural repair mortar.

  3. Install a Gunnable Waterstop around all penetrations. The waterstop must be packed in between at least a 50mm cover of Aftek Penapatch Structural HB80. Gunnable waterstop products are caulk-grade, single-component swelling pastes used to stop water infiltration through concrete construction joints.
  4. Install TPA Screed to achieve appropriate falls to waste. Where a bonded screed is required, apply a bond coat using TPA 401M or TPA Lite. Install TPA Rapid Screed for an engineered or rapid set screed, using a bond coat of TPA Rapid for bonded screeds.

    TPA Screed is a pre-blended screed mixture for the installation of cementitious screeds and tile beds, suitable for internal and external floor applications.

    TPA Rapid Screed is a pre-blended, rapid set, engineered screed mixture for the installation of cementitious screeds and tile beds, suitable for internal and external floor applications.

  5. Apply Soprema Antirock Primer to the substrate being waterproofed.Soprema Antirock Primer is a blend of SBS-modified bitumen, fast-evaporating solvents and adhesive-enhancing additives. It is used to prime concrete and metal surfaces to improve the adhesion of Soprema bituminous torch-on membranes.
  6. Install Soprema Soprasun Plus 3 base sheet membrane once the primer has dried.Soprema Soprasun Plus 3 is a plastomeric-modified bitumen waterproofing membrane (APP). The upper surface is sanded. The lower surface is coated with a thermo-fusible polyolefin film.
  7. Install Soprema Sopragum Garden 4 Plus cap sheet membrane.

    Soprema Sopragum Garden 4 Plus is a root-resistant, APP-modified bitumen sheet membrane. Used as a top layer in multilayer waterproofing systems where root resistance is required.

  8. Detail all penetrations with Soprema Alsan Flashing Quadro incorporating Soprema Alsan Fleece 165 B, ensuring complete encapsulation of the reinforcing fleece.

    Soprema Alsan Flashing Quadro is a single-component, root and rhizome-resistant polyurethane resin used for flameless waterproofing junctions between horizontal surfaces, up-stands and various roof details.

    Soprema Alsan Fleece 165 B is a non-woven polyester fleece specially designed to be used as reinforcement and ensures a minimum layer thickness of the Alsan Flashing Quadro waterproofing resin.

  9. Install Aluminium K Flashing or Aluminium Pressure Seal with appropriate mechanical fixings to protect the exposed membrane edge at the top of the wall. Seal the top of the pressure seal with WPA MS or WPA SPUR.

    Aluminium K Flashing is an extruded aluminium flashing with pre-punched holes, designed for the top termination of sheet membrane systems.

    Aluminium Pressure Seal is designed to seal the top edge of sheet membrane systems.

    WPA MS is a single-component, moisture-cured silane-modified hybrid sealant.

    WPA SPUR is a high-quality, professional, universal, low-modulus sealant based on hybrid technology.

  10.  Prime Aluminium K Flashing or Aluminium Pressure Seal using WPA 160 primer.

    WPA 160 is a specialised solvent-free primer designed for enhancing the adhesion of subsequent membranes, adhesives, toppings and decorative finishes over non-porous substrates.

  11. Apply WPA 460 or WPA 560 primer to the capping and external face of the wall above the Aluminium K Flashing or Aluminium Pressure Seal.

    WPA 460 is a two-part, water-based epoxy primer, used to seal concrete and masonry surfaces.

    WPA 560 is a two-part, water-based epoxy primer, designed as a water and vapour-proof coating under waterproofing membranes.

  12.  Apply WPA 200 or WPA 230UV waterproofing membrane to the primed Aluminium K Flashing or Aluminium Pressure Seal, the capping and the external face of the wall.

    WPA 200 is a flexible, two-part, rapid-drying, cementitious waterproofing membrane system, specifically designed for use under tile, stone and exposed applications.

    WPA 230UV is an elastomeric, fibre-reinforced, water-based polyurethane membrane system designed for exposed or under-tile applications.

  13.  Install WPA Drainage Cell over Soprema Sopragum Garden 4 Plus, terminating under the Aluminium K Flashing or Aluminium Pressure Seal.

    WPA Drainage Cell is a two-core drainage sheet consisting of a non-woven geotextile filter layer thermally welded to a water-impermeable, recycled HDPE (High-Density Polyethylene) drainage membrane.

  14.  Install an internally filtered riser for the purpose of relieving hydrostatic pressure.

Products Used

  • Aftek Penapatch Structural HB80

  • TPA 401M
  • TPA Lite
  • TPA Rapid Screed
  • TPA Screed
  • WPA 160
  • WPA 460
  • WPA 560
  • WPA 230UV
  • Soprema Antirock Primer
  • Soprema Soprasun Plus 3
  • Soprema Sopragum Garden 4 Plus
  • Soprema Alsan Flashing Quadro
  • Soprema Alsan Fleece 165 B
  • WPA MS
  • Aluminium K Flashing
  • Aluminium Press Seal
  • WPA Drainage Cell
  • WPA 200