CYH 500 Single Component Hydrophobic PU Grouting Compound (10 kg)

91 000 74051 CYH-500 is a single-component hydrophobic polyurethane grout that, upon contact with water, expands into a closed-cell rubber-like foam. It is used to stop water leaks, fill small cracks, joints, honeycombs, and voids in concrete structures. It cures into a constant volume material that neither shrinks nor swells. Ideal for water tanks, tunneling, sewage, basements, and other structures exposed to moisture.Uses / ApplicationsFilling and sealing cracks, joints, and honeycombs in concrete   Pipe intrusions, leak points in pipe penetrations   Water tanks, sewage, tunnels, dams, manholes   Concrete defects in both dry and wet concrete surfacesFAQ (Questions & Answers)Q1. How fast does CYH-500 set / react?Gel time is ~110 seconds (25 °C) when resin:water is 2:1 ratio. Induction is ~15 seconds. Q2. Will it shrink after curing?No. It cures to a constant volume, with no shrinkage or swelling after cure. Q3. Can it be used under flowing water / wet concrete?Yes — it's hydrophobic and bonds well to wet surfaces. Negative-side application also possible. Q4. What is its expansion capability?When mixed in resin:water ratio ~10:1, expansion up to ~27-30× (2700 %) is possible. Q5. What conditions are needed (temperature, surface)?Substrate & ambient temperature should be ≥ 5 °C. Store product in dry, cool place. Apply on clean surfaces. Work in moderate conditions for better performance. Q6. How much will 20 kg cover / fill?Depends entirely on crack size, depth, width, amount of water mixed. Because it expands, a small volume can fill larger voids. As a rough estimate, for very fine cracks maybe few linear metres; for cavities depends on expansion ratio and injection methodology. Better to do a mock-trial.Q7. Approx price?Please visit CIVILIZEMART