In structural engineering and construction, controlling fluid ingress is fundamental to long-term durability. Whether designing water storage assets, civil containment structures, or below-grade building envelopes, selecting the correct barrier placement helps determine how the structure manages hydraulic loads.
Understanding positive-side waterproofing how it works, where it applies, and how polyurea membranes can be applied across different substrates helps engineers, applicators and asset owners specify appropriate waterproofing systems.
Positive-side waterproofing involves installing a protective membrane on the water-facing (wet) side of a structure. This configuration places the membrane between the liquid and the substrate, so hydraulic pressure acts against the membrane and pushes it towards the underlying surface.
Proper surface preparation and sequential application are essential for a continuous waterproofing system.
1. Surface Preparation — CSP 2–5
Mechanically prepare the concrete to CSP 2–CSP 5. Ensure the surface is clean, dry and free from laitance, contaminants and loose material.
2. First Sealer Coat
Apply Civilox-LV100 to seal and prepare the concrete surface.
3. Second Sealer Coat
Apply a second coat of Civilox LV100, then broadcast Renderfill F300 before applying the membrane.
4. Elaston-W80 Application — Minimum 3 mm
Spray-apply Elaston-W80 pure polyurea to a minimum thickness of 3 mm, subject to project requirements and product data. Once cured, it forms a seamless elastomeric lining.
Dincel surfaces require specific preparation before membrane application.
1. Solvent Wipe
Clean the surface with a suitable solvent and dry with a clean cloth.
2. Mechanical Abrasion
Abrade using 80-grit sandpaper or sanding disc.
3. Dust Removal
Remove loose material and sanding dust using a vacuum or clean compressed air.
4. Controlled Flame Treatment — 100–110°C
Use a propane gas torch with the flame kept moving. Monitor the surface with an infrared thermometer and do not exceed the substrate’s melting point.
5. Elaston-W80 Tie-In
Apply approximately 3 mm of Elaston-W80 from the adjoining geofabric onto the treated Dincel surface.
Safety: Flame treatment must be performed by trained applicators following Dincel and Liquimix technical documentation, site hot-work procedures, risk assessments and applicable Australian WHS requirements.
Proper surface preparation is essential for achieving reliable adhesion and system performance.
Always follow the applicable Liquimix technical documentation and substrate manufacturer requirements.
The right positive-side waterproofing system depends on the substrate, service conditions, liquid exposure and structural requirements.
For project-specific guidance, system selection or technical information on Liquimix polyurea systems, contact the Liquimix technical team.
There is no excerpt because this is a protected post.
Choosing the right insulation has a major impact on the thermal performance, comfort and energy efficiency of a building. But with so many insulation options available in Australia, how do you know which one is right for your project? Closed-cell spray foam, open-cell spray foam and batt insulation all have
There is no excerpt because this is a protected post.
There is no excerpt because this is a protected post.
