epoxy vs polyurethane

The Callback Nightmare You used epoxy grout to fix a basement crack. It worked—for six months. Now, the leak is back, the client is furious, and you’re eating the cost of a redo. Why Epoxy Fails (And Polyurethane Wins) Factor Epoxy Grout Polyurethane Grout Cure Time 4+ hours 20-90 seconds Flexibility Brittle (cracks under movement) 300% elongation Water Resistance Fails if damp Bonds underwater Lifespan 2-5 years 10+ years Case Study: The Parking Garage That Saved $120K A mall’s underground garage had leaks after every thaw cycle. Epoxy injections failed twice. After switching to polyurethane grout:✔ All leaks sealed in one application✔ No cracks reappeared after 4 years✔ Saved $120K in repeat repairs Pro Tip: For active leaks, use hydrophobic grout that expands upon water contact.