The Flexible, Fast-Acting Leak Stopper
Sep 05, 2025
The Problem: Active Leaks That Won’t Wait
Water is gushing into your basement or parking garage, and you need a solution yesterday. Polyurethane grout is designed for exactly this scenario.
Why Polyurethane Grout Shines
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Instant Set Time: Cures in 20–90 seconds upon contact with water, making it ideal for emergency leaks.
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Unmatched Flexibility: Expands up to 300%, accommodating concrete movement without re-cracking.
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Bonds to Wet Surfaces: Works even in actively leaking cracks, no drying required.
Ideal Applications
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Basements and Foundations: Where groundwater infiltration is common.
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Waterfront Structures: Docks, retaining walls, and sewage systems exposed to constant moisture.
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Utility Penetrations: Sealing gaps around pipes and conduits.
Limitations to Know
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Not for Dry Cracks: Requires moisture to activate and cure properly.
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Lower Strength: Not suitable for structural rebonding—use for sealing only.
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UV Sensitivity: Degrades in direct sunlight unless top-coated.
Pro Tip
For gushing leaks, use hydrophobic polyurethane grout, which expands aggressively when it contacts water.
"Polyurethane grout saved our basement from flooding during a hurricane—it set faster than we could blink."
— Homeowner, Florida