SikaFix® PU – Flexible Polyurethane Grout for Water‑Activated Crack Repair

SikaFix® PU is a high-performance, water-activated polyurethane grout designed to stop active water leaks in concrete structures. Injected as a low-viscosity liquid, it expands upon contact with moisture to form a tough, flexible closed-cell foam that bonds securely to substrate, even when wet. With rapid reaction & gel times (39 s / 460 s), it’s ideal for time-sensitive repairs. Applicable via both low- and high-pressure injection systems, it’s perfect for sealing cracks under hydrostatic pressure—found in basements, foundations, tanks, tunnels, pipes, pools, and more. Certified for use in Canada by transport and environmental ministries, SikaFix® PU offers lasting, resilient protection against water intrusion.

• Expands on contact with water to form a flexible, closed-cell foam that seals leaks instantly
• Bonds strongly to wet or damp concrete, ideal for use in active leak or below-grade conditions
• Fast reaction time — begins foaming in ~39 seconds and gels fully in under 8 minutes
• Permanently flexible and resilient, allowing it to absorb structural movement without cracking
• Effective under hydrostatic pressure, making it suitable for basements, tunnels, pools, and tanks