H2O Supplies

H2O Xpanda PU Flex – Hydrophobic PU for Active Leak Injection

$450.00 AUD
$450.00 AUD
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Prices shown exclusive of GST.

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H2O Xpanda PU Flex is a hydrophobic polyurethane injection system designed to stop active water leaks in concrete and masonry. It reacts with moisture to form a semi-flexible foam that rapidly cuts off water ingress under hydrostatic pressure.

This is a two-part system (Resin + Catalyst) designed for controlled reaction on site. The adjustable catalyst dosage allows you to manage reaction time depending on leak severity, temperature, and water flow.

Commonly used for basement leaks, retaining walls, service penetrations, and active crack injection where immediate water cut-off is required.

IMPORTANT: Part A (Resin) and Part B (Catalyst) must be used together. The system will not react or perform without the catalyst.

• Hydrophobic polyurethane injection system
• Semi-flexible cured structure (not rigid)
• Adjustable reaction time via catalyst ratio
• Foaming expansion up to approx. 30×
• Penetrates fine cracks due to low–medium viscosity
• Withstands high hydrostatic pressure
• Reacts with fresh, saline, and mineral water
• Solvent-free formulation

• Active water leaks in concrete structures
• Basement and retaining wall ingress
• Cracks in concrete and masonry
• Pipe penetrations and service entries
• Tunnels, pits, and underground structures
• Soil stabilisation and water cut-off barriers
• Ground consolidation and underpinning support

• Chemistry: Hydrophobic polyurethane (MDI-based)
• Form: Liquid resin + catalyst system (NOT single component)
• Reaction type: Moisture reactive foaming
• Viscosity: 200–350 cps
• Density: ~1.18
• Appearance: Brown liquid
• Expansion: Up to approx. 30×
• Flexibility: Semi-flexible cured foam
• Application: Injection under pressure
• Pack size: 20kg resin + catalyst
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